It can be useful for troubleshooting, and compressing SPF records. An SPF record starts with v=, telling the readers and the DNS which version of the SPF is being used. With an SPF record in place, Internet Service Providers can verify that a mail server is authorized to send email for a specific domain. org include:sendgrid. mimecast. MxToolbox's SPF Flattening is automatic and adaptive, enabling you to specify new Verified Email Sources and to have a new SPF record almost instantaneously. Here is an example SPF record: v=spf1 include:_spf. NET 5. All of our paid plans come with access to our highly experienced technical support team. com -all This record allows any host with an IP address specified in. Our simple DMARC Analyzer pricing packages are based on outbound DMARC-compliant mails only. If an include mechanism is found, SPF record flattening will call a recursive function to flatten the child SPF record specified by the include mechanism. That’s why we’re launching Universal SPF, an in-line upgrade to traditional SPF. You will need to add the missing senders to your SPF record or use an SPF Flattening tool. Incorrect SPF record syntax. Our tools are designed to easily expose the issues threatening your email delivery. MxToolbox SPF Flattening: Reviews the Verified Email Sources and manually added IP addresses currently in the SPF record. For Record name, specify a name. MxDelivery Center analyzes your DMARC, DKIM and SPF to give you the insight you need to make email configuration changes and get your emails to your customer's. Then those records contain IP values that used to be part of the main SPF record. Too many characters RFC specifies a 255-string character limit for the protocol, which means too long a record will lead to broken SPF. Enter your domain in the ‘Host value’ field. ourDomainName. AutoSPF performs all the things you would expect from an SPF flattening services. SPF records are mostly simple, and instructions for the recipients’ servers regarding the treatment of. The “SPF record flattening” procedure is as follows: Get the IP addresses for each of the DNS-querying mechanisms/modifiers used in the record by querying the DNS. Most providers give you their SPF records, but none of. This project implements Sender Policy Framework (SPF) record flattening for CloudFlare managed DNS zones. edgerc (based on Akamai instructions ). Require the SPF record in the DNS so that it can validate it. The SPF Record Check is a diagnostic tool that acts as a Sender Policy Framework (SPF) record lookup and SPF validator. g. PowerDMARC’s free SPF record generator allows you to: Instantly create an SPF record for your domain. Comments Here are some insights into your SPF record. 1. . Create a new TXT Record. Only “safe” mechanisms you have in SPF that doesn’t count for “DNS lookups”, would be ip4: and ip6:. We flatten the SPF entries (so you stay under the 10/10 DNS lookups) under one include. em. Select Add New Record and then select TXT from the Type menu. You can click Diagnostics , which will connect to the mail server, verify reverse DNS records, perform a simple Open Relay check and measure response time performance. Television. GPL-3. Higher compliance rates. I have named the project Expurgate. When first implementing an SPF, the network’s authority should always use spf1, the most frequently used SPF between email interactions. You can use an SPF flattening service or subdomains for different services to resolve the problem. Look Up DKIM Record. The end result is a simple SPF record for google. A DNS TXT (“text”) record lets a domain administrator enter arbitrary text into the Domain Name System (DNS). The 10 SPF lookup cap introduced by SPF is one of the SPF flattening restrictions. General Usage. DMARC or ‘Domain-based Message Authentication, Reporting, and Conformance’ is the umbrella mechanism forming the basis of authentication checks like SPF and DKIM. While the limit is extremely easy to exceed when you use multiple vendors to send your emails, staying under the limit is just as easy with an auto SPF flattening tool. outlook. Generate your unique SPF record, publish it on your DNS, and you’re all set!gknaddison May 12, 2023, 4:36pm 1. We define our spf records once (with good comments), and select which records we want flattened out (it can be tricky to fit everything so that it fits in one record and is all under 10 records. Automatic/dynamic SPF record flattening. knaddison September 27, 2021, 2:37pm 1. By. MxToolbox offers an SPF Flattening tool as part of our Delivery Center Plus plan. A more refined and better solution to multiple DNS lookups is Dynamic SPF Flattener. r53spflat is an extension to sender-policy-flattener which is a different project maintaind by centanu. Search for jobs related to Spf flattening tool or hire on the world's largest freelancing marketplace with 22m+ jobs. This includes creating and updating these records. Exceeding the SPF record length limit of 255 characters. Help on SPF record checker. SPF errors are widespread because simple tasks like activating new email vendors can overflow and. com) and transforms it into this:cfflatten CloudFlare SPF Flattener. SPF flattening came about to be a solution a very specific problem: That a lot of senders utilize multiple service providers, utilizing business email platforms like. 同一ドメインのDNSに複数のSPFレコードが発行されている. Menu. Spoofing is the unauthorized use of email by forging a domain name or address. Paste the record. Each Manual flattening basically means evaluating your desired SPF record converting all the hostnames into IP addresses along the way. com -all. exceed 10 host lookup limit. Since SPF flattening is a time-consuming manual process, it’s ripe for automation. You should see that it passes with an output similar to the example below: Example SPF policy details: IP address: 13. This helps to keep a live audit log of what each IP address is for, who put it there, and when it can be removed. The receiving server will issue up to 10 DNS lookups to. DMARC and SPF flattening service I am in need of a reputable DMARC email analysis and SPF flattening service (turns dns dmarc records into ip list so its not over 10 dns requests) I need a reputable service as this could affect our outgoing emails. Set mechanisms which authorize certain IP addresses. Exceeding the Maximum Limit of 2 Void Lookups. Dmarcian indicates that their "SPF Surveyor" was the first tool to help address this problem by reading your existing SPF record, and providing a new, smaller, "flattened" SPF record in response, to reduce the number of DNS lookups needed to fully process the record, to get around the "10 DNS lookup" limit inherent to the SPF specification. Help on SPF record checker. SPF tools. Step 9: Click on Automatic Setup and replace your existing SPF record with the automatically generated SPF record. We have 11 DNS entries, some brought in by recursion (thanks gmail!) The ip4 and ip6 entries do not contribute, only things that cause a DNS lookup count. Provide these entries as a chain of spf include entries. Everything I've sent today is bouncing because. Requirements. The generated SPF-record can then be stored as TXT resource record in the zone of your name server. It addresses the challenge of the “10-DNS-Lookup” limit by dynamically flattening SPF records into a single, consolidated record. include:, a:, mx :, exists: Only “safe. secureserver. SPF Flattening. Copy the value of the SPF record, and then choose Create record. I think the correct answer is: v=spf1 +a +mx include: spf. At PowerDMARC, our users configure PowerSPF which is an effective SPF flattening tool. During the lookup process, the SPF record is retrieved from the sender’s domain’s DNS. Sender Policy Framework (SPF) is used to authenticate the sender of an email. Any SPF check would be looking up SPF according to the macro here. exceed 10 host lookup limit. You can fix Permerror by deploying PowerSPF, an SPF Flattenin. google. However, since ISP's change their IP addresses frequently, the flattened IP addresses change accordingly. This test will list DNS records for a domain in priority order. Your SPF record is inaccurate. SPF Flattening. This eliminates the need for DNS lookups. SPF record is being read from left to right, so it makes sense to put the most critical or frequently used email sources at the beginning of the record. Phone: 1 778 265 0114 Mail: info@timberstonetools. 2. This record could be flattened to have zero DNS lookups and would look something like this:SPF Flattening and its advantages The DNS lookup limit is a restriction imposed by email servers that limit the number of DNS lookups that can be performed when verifying an email’s SPF record. One of the limitations that SPF introduced is the 10 DNS lookup limit. example. AutoSPF API. With this tool you can inspect and validate your SPF DNS record. Here to help you. com ~all. This test will lookup an SPF record for the queried domain name, display the SPF Record (if found), and run a series of diagnostic tests (SPF Validation) against the record, highlighting any errors. You can’t have more than one SPF record for a domain. Through "flattening" an SPF record, one can reduce the number of DNS-querying mechanisms/modifiers so that it's smaller than 10. As defined in sections 3. If you use multiple email service providers, then flattening the SPF record every time is even harder and error-prone. com include:transmail. Create Ticket You can create a new ticket. General Usage. Generate a unique SPF record with our free tool to secure your domain. SPF Record Check. ; Email Email us with your customer support inquiry. Tools; SPF Record Generator; SPF Record Generator. Answers to your Frequently Asked Questions on Sender Policy FrameworkSPF flattening is functionality meant to help deal with overly chunky SPF records that contain too many references to too many different service providers or IP addresses. This site uses cookies. or. 1. Your original TXT record which causes more than 10 DNS look-ups should be saved as an otherwise. ” Flattening is simply replacing all the domains in the SPF record with their IP addresses, which eliminates the need for DNS lookups. Their blog, MxToolbox: How to Enable SPF, DMARC, and DKIM, is a great guide for setting up SPF, DKIM and DMARC in a single outbound email sender Office 365 configuration. net ~all. DMARC records when configured in the right way can benefit you in more ways than one. . This tool can flatten SPF records for free for you. Click “+ Add Row” to create a new record. SPF Delegation Frequently Asked Questions. This authorization is done by publishing a record in the DNS (Domain. za ; 1: include:za. DMARC Record Check. Prior to creating an SPF specific subdomain, try to use CIDR notation for IP ranges in order to reduce the length of your SPF record under the 255 character limit. The SPF record analysis was performed. Award winning e-mail security and monitoring software for Microsoft Exchange and IIS. It is very common for organizations, when constructing or modifying their SPF record, to run up against the 10 DNS lookup limit. 3, a single text DNS record (either TXT or SPF RR types) can be composed of more than one string. Looking at the Audit Log area these records were created on April 17th and 18th by a. SPFFlatten. Domain-based Message Authentication, Reporting & Conformance. You may also check each MX record (IP Address. Dynamic SPF allows you to have more than 10 DNS lookups without the worry to hit your lookup limit. (Note that in manual mode, no DNS changes are made or served, meaning the tool is only used for flattening, and effecting change depends on the domain's DNS administrator - This is why we can use amazon. DMARC vulnerability refers to very common errors that users make while implementing the protocol or enforcing it. Menu. This is because, at one point, SPF records were created as their own record type (separate from a TXT record). These include your own servers, your corporate Inbox Provider, 3rd party. The SPF record for google. The DNS query for the SPF policy record itself does not count towards this limit. Welcome to DMARC Advisors’ SPF Check: the best tool to verify your Sender Policy Framework record. Get advanced DMARC and Hosted MTA-STS/TLS-RPT services, powered by AI and Threat Intelligence – no contracts no commitments. All. After completing these steps, if you’re going to be sending out emails under the same domain name, it’s always a good idea to test your emails before. Award winning e-mail security and monitoring software for Microsoft Exchange and IIS. Tools. Check for multiple SPF records. com aren't really adding any value; so we can just drop those records and update example. You need to check echoworx's SPF record and determine where your mail is coming from, because it looks like they are the main offender when it comes to lookups, just their include alone is 5 lookups. It provides a simple, intuitive system to help manage your complex SPF configurations. PowerSPF is a one-click auto SPF Record with unlimited lookups that never fails the 10 DNS Lookup limit! An Automatic SPF flattening approach to your Sender. com ~all. Each time they replace a modifier, the SPF. com) Import DNS SPF record into system. Click here to learn how to merge SPF records. 4 states that evaluation of an SPF policy may not exceed 10 terms that require DNS lookups. Our SPF Flattening Tool is a revolutionary feature and a disruptive development in the market in terms of performance, security and management. SPF email records help maintain a list of verified senders for your domain that can be publicly looked up and retrieved by receiving. Skip to main content. If you don't, you probably don't need one yet. As of today, every known server and mail gateway that was capable of traditional SPF now supports Universal SPF. com include:spf. net include:anotherSite. Automatic flattening all domains in the include. The DNS lookup is done directly against the domain's authoritative name server, so changes to DNS Records should show up instantly. Creating additional SPF records for subdomains. 0. The domain owner publishes an SPF record in their DNS (Domain Name System) records, specifying the authorized mail servers that can send emails on behalf of the domain. This service was brought to you by ORF, our award-winning email security solution for Microsoft® Exchange and IIS SMTP servers. SPF. This isn’t a case where spam emails are being sent from your own domain. This tool - spflat - solved many problems and has some excellent features and characteristics. In some cases, people turn to SPF flattening tools to work around the 10 DNS lookup limit. SPF DNS lookup limit. That’s over 1 Billion inboxes you could be missing! MxToolbox Delivery Center Plus provides the best solution for setting up and monitoring your DMARC, DKIM and SPF compliance rates. No charge for phishing attacks, or invalid mails sent on your behalf. SPF flattening offers the most effective solution to the problems caused by the SPF lookup limit. The more 3rd-party email sources you add to your domain, such as Marketing Automation, CRMs, Customer Support, and Order Fulfillment, you quickly max. Sign up with your email address. It provides a simple, intuitive system to help manage your complex SPF configurations. com include:spf2. Configure SPF authentication for your domain by publishing the SPF record in your DNS. As per RFC 7489. Contact us via Email, Phone, or TicketAn SPF policy is a list of mail servers authorized to send messages on behalf of your domain. In an attempt to reduce the number of DNS lookups occurring against our DNS SPF record I have written a PowerShell script which will extract out all of the allowed IP addresses from a SPF netblock (i. In the SPF/SIDF Verification section, click Yes. The SPF Record Check is a diagnostic tool that acts as a Sender Policy Framework (SPF) record lookup and SPF validator. This project implements Sender Policy Framework (SPF) record flattening for CloudFlare managed DNS zones. Use an Automatic SPF Flattening Tool. In the Editor, click “Export” and then “Download PDF”. This can be as simple as removing a few duplicate entries (Gmail is often included in many provider SPF records) or completely refactoring the list of. 1. 123 a -all”Navigate to your domain section and publish the following SPF record: v=spf1 include:_netblocks. Consequence is some mail servers will silently drop emails; RFC7028 says that over 10 lookups: SPF implementations MUST limit the total number of those terms to 10 during SPF evaluation, to avoid unreasonable load on the DNS. I have read that ‘SPF Flattening’ is not a good idea, (I don’t know what that is anyway), so hoping for other suggestions. More DNS lookups = More problems. SPF flattening exists to clean up the SPF record and bring the DNS lookup under 10. cfflatten CloudFlare SPF Flattener. Gmail: 4/10 records; Salesforce: 8/10 records; Office 365: 2/10 records; Additional third-party tools and platforms add even more records. All of our paid plans come with access to our highly experienced technical support team. If you still want to manually flatten, here's one flattened below to about 8 lookups, with one caveat. SPF records only permit 10 ‘lookups’ to lessen the strain on the email receivers’ side and issues with SPF modifications. com for our example without impacting the real amazon. They use an actual RFC 7208 compliant library (pyspf) for tests and will dynamically test for processing limit errors (no other testers I'm aware of do this). The ‘-all’ tag specifies a fail (or hardfail. The current SPF record configuration needs to be. If you use multiple email service providers, then flattening the SPF record every time is even harder and error-prone. edgerc file should be placed in the project root directory and should have the following format:Here’s how the SPF include mechanism works: The domain owner publishes an SPF record. SPF allows up to 10 DNS queries upon validation. Signup for a Free MxToolbox account to run Free Bulk Lookups for MX, A, DNS, Geo, ASN, SPF & More. You can use our SPF flattening tool to optimize your record automatically that never exceeds the 255 character SPF record length limitHow does SPF record flattening help overcome the 10 DNS lookup limit. Our SPF record testing tool also advises on optimizing the. A fim de validar e-mails, o SPF especifica ao servidor de. ( Here is a list of which providers/solutions provide SPF flattening/macros) Or alternatively, using subdomains for each sender. DMARC Email Delivery Tools. An SPF record starts with a “v,” indicating the SPF version used. We spend all our energy and resources focused on the best technology solutions for your SPF management. Just as fast as a regular SPF record will be updated. If you want to learn more about SPF, see our SPF knowledge base article. google. Route53 SPF Flattener. Access your DNS management console. Email has security standards to control which senders are allowed to send email for your domain. We'll test the record against all requirements from the SPF standard RFC7208. Thanks. SPF record flattening, as the name indicates, is a process to sort of "flatten" the hierarchy in an SPF record so that the flattened record contains fewer than 10 DNS lookups. Our Main SPF Record: v=spf1 include:spf. 479 John Street, Victoria, BC V8T 5H1 Canada. Flattening refers to the replacement of all the domains in your SPF record with their respective IP addresses. It is a feature of. The project is opensource; It will query your list of approved sendors and flatten these into a list of appropriately formatted and sized spf records composed of ip4 and ip6 spf entries. example. Sigue los pasos que se indican en este artículo si has configurado SPF, pero los mensajes enviados desde tus dominios continúan teniendo estos problemas: No superan la autenticación SPF. TXT records were initially created for the purpose of including important notices. 1. EasySPF eliminates the constant back and forth to your DNS provider. g. MxToolbox's SPF Flattening Tool provides you with a simple, intuitive system to help manage your complex SPF configurations. Lets us know if you found this useful. Sender Policy Framework, more commonly known as SPF, is an email authentication standard that allows a domain owner to authorize the use of its domain in email messages, with such authorization tied to the physical source of the message. It is a new realm in email security that offers domain owners a wealth of information about their email sending sources and performance. Everything is squeezed into an include. Set the type to TXT and enter your SPF record in the right column (substitute your server’s IP address. That limit is 10. Wait while we convert your file to JPG to flatten your PDF. Therefore, you should use a flattened SPF record as a workaround. Mimecast offers a free SPF record check as well as a free DMARC record check and a free DKIM signature check service. We will explain how automatic/dynamic SPF record flattening can solve this problem below. Although this feature is desirable in some circumstances, it is a major obstacle to reducing Unsolicited. Alternatively, you can flatten records to remove DNS lookups. However, some domains have SPF records requiring 10+ DNS queries, which results in SPF validation failures and deteriorated email deliverability. google. Under the Records section, select SPF. Enter the SPF record that you have already created in the “Value” or “Target” column. GlockApps has the built-in tool called SPF Flattener which automates SPF record flattening. 🔥 Universal SPF 🔥 Remove DNS lookups and fix policy errors in seconds. SPF. It is one of the best SPF lookup counters to avoid reaching the SPF lookup limit. If you are looking for an SPF flattening tool you already know what SPF flattening is. We currently have 12, and so would like to reduce it to the recommended maximum of 10. Use an Automatic SPF Flattening Tool. The more 3rd-party email sources you add to your domain, such as Marketing Automation, CRMs, Customer Support, and Order Fulfillment, you quickly max. Our SPF check tool will evaluate whether you have an existing SPF record published on your DNS. It is also called an SPF record compression. The tool below could be used to check whether your domain has a SPF record. DynamicSPF carries out dynamic flattening and auto-updates the netblocks to make sure your authorized IPs are always up-to-date. As an integral part of email cybersecurity, SPF enables the receiving mail server to check whether incoming email comes from a domain authorized by that domain’s administrators. SPF Flattening. Use our free tool to validate your SPF record in seconds. Enter your SPF policy details (not the one shown in the example below) and use an address in your domain. Flatten your SPF records manually (NOT RECOMMENDED) SPF flattening is the process of converting an SPF record into a format that contains fewer than 10 DNS lookups. eu. include:, a:, mx:, exists:. To defend against these, once you've set up SPF, you should configure DKIM and DMARC for Office 365. Tools. This is a highly critical limitation to prevent Denial of Service (DoS) attacks. More DNS lookups = More problems. 1 fork Report repository Releases No releases published. What is the difference between SPF fail and Permerror?With AutoSPF you won't need to constantly modify your DNS records in order to update SPF. SPF appears valid . Email headers are present on every email you receive via the Internet and can provide valuable diagnostic information like hop delays, anti-spam results and more. Reducing Risks of Misconfigurations. Whether you are an email novice, professional, marketer or technician, Delivery Center will help you get your message through. It could be caused by various reasons, such as syntax errors, exceeding the SPF record limit, or incorrect DNS configuration. In our case we used the SPF survey site listed below which helps to flatten your records by using IP address ranges. An SPF Flattening service will regularly check the email sources you specify should be part of your SPF records, parse, deduplicate and refactor them to ensure a “flat” SPF record that meets the lookup restrictions on SPF. The SPF record is a TXT record, so you need to publish it in your DNS as a TXT record as follows: Navigate to the DNS for your desired domain. An SPF flattening tool reduces the instances of errors by compressing all authorized sources into a single, comprehensive, inclusive, yet simplified record that takes care of misconfigurations. 100% SPF Focus. So we added support for flattening the source spf records as a transformation each time the tool runs. This service was brought to you by ORF, our award-winning email security solution for Microsoft® Exchange and IIS SMTP servers. spf1. The MX lookup is done directly against the domain's authoritative name server, so changes to MX Records should show up instantly. SPF flattening isn’t a one-time deal; hence, you need an automated process; you must change your SPF. 4. With Dynamic SPF Flattening, organizations are likely to create a centralized SPF record that includes. SPF Flattening. com is as follows: v=spf1 include:_spf. An SPF Flattening service will regularly check the email sources you specify should be part of your SPF records, parse, deduplicate and refactor them to ensure a. In essense an authorization list of who can send in your behalf) Unless you have a very complex SPF record, you should only need 1 SPF Record. com -all This record allows any host with an IP address specified in the SPF record of _spf. The ‘all’ mechanism was invented for SPF, long before DMARC came and took over the role of policy officer. It can be. We maintain a database of the latest flattened records and update them in real-time for our users. The more 3rd-party email sources you add to your domain, such as Marketing Automation, CRMs, Customer Support, and Order Fulfillment, you quickly max. By using a flattened SPF record, you can flatten the number of DNS querying mechanisms/lookups to 1. There are some obvious things we can do to reduce the number of lookups; e. Click Test SPF Record. This set of tools are core to DMARC and Email Delivery. Check Power ToolBox Now! gknaddison May 12, 2023, 4:36pm 1. Checks the existence of your published SPF record. somesite. SPF Flattening. 3. 4. It means putting the IP addresses in place of all the domains in the SPF record. Domain: To get straight to the point: SPF Flattening is the ultimate solution for your ‘ Too Many DNS Lookups ’ problem. Improve your. SPF flattening is functionality meant to help deal with overly chunky SPF records that contain too many references to too many different service providers or IP addresses. It also features a DNS lookup counter. Use an automated service that flattened the record and then keeps it updated. As part of MxToolbox Delivery Center, we automatically detect the sources that are sending email on behalf of your domain. SPF is designed to help prevent spoofing, but there are spoofing techniques that SPF can't protect against. In order to promptly modify your SPF record you can use the following SPF best practices: Try typing down your email sources in decreasing order of importance from left to right in your SPF record. You need to check echoworx's SPF record and determine where your mail is coming from, because it looks like they are the main offender when it comes to lookups, just their include alone is 5 lookups. outlook. com include:_sampledomain3. Contact us via Email, Phone, or TicketABOUT DNS LOOKUP. Lastly, ensure that the final merged SPF record starts with the “v=spf1” modifier and ends with the “all” mechanism. DNS NS Record Lookup Tool – NS Record Lookup Online; DNS PTR Record Lookup Tool – PTR Record Lookup Online; DNS Record Checker Tools – Check DNS Records Instantly! DNS Record Lookup APIs: A, CNAME, MX, NS, PTR, SOA, TXT Record Retrieval APIs; DNS TXT Record Lookup Tool – TXT Record Lookup Online; Do you need DMARC if. script to expand/flatten SPF records Resources. google. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. C. It provides a simple, intuitive system to help manage your complex SPF configurations. Inspect any domain's SPF record and learn how to fix it. Philadelphia 76ers Premier League UFC. This test will lookup an SPF record for the queried domain name, display the SPF Record (if found), and run a series of diagnostic tests (SPF Validation) against the record, highlighting any errors. The tool will show the number of DNS querying mechanisms used in the SPF record for your domain. SPF is a DNS-based mechanism for defining a whitelist of mail servers that can send email on your domain’s behalf. Where are Flattened SPF records DNS hosted? SPF Record too Long at your Registrar. It helps you in the following way: Easy configuration to your domain. You will need to add the missing senders to your SPF record or use an SPF Flattening tool. Are you confident your email is getting through? MxToolbox is YOUR expert on email deliverability. Enterprise policy management. RFC 7208 Sender Policy Framework (SPF) April 2014 1. You won't know if they make a change until you possibly start having bounces. SPF flattening. With manual flattening you need to constantly monitor your service providers for these changes, which is troublesome and not recommended. outlook. Route53 SPF Flattener. Mimecast manages and hosts the SPF record, which prevents lookup limitations and duplicate entries. These tools are meant to help you deploy SPF records for your domain. AutoSPF makes it possible for email users and domain owners to guarantee email deliverability without having to worry about their DNS lookups or authentication. This test will connect to a mail server via SMTP, perform a simple Open Relay Test and verify the server has a reverse DNS (PTR) record. Make sure you remove redundant, repeated, and NULL mechanisms within your SPF record which also adds to the character limit. When a source changes the monitored SPF record, this change will be processed, and the delegated SPF record will be updated accordingly. With SPF delegation, your records are compressed, and sometimes even your email providers are hidden from mail transfer agents to prevent SPF lookup failure. Then building your SPF records completely out of IP addresses. Say goodbye to permerrors, excessive DNS lookups, SPF record flattening, problematic ESP verification, and a host of other challenges. I’m leaning toward option #6 and have been searching around. SPF Compression. Concluding the Experiment: SPF Flattening. Use our free SPF Record Generator tool to secure your domain. When someone tries to send you an email, their server checks the SPF policy for your domain to determine if it should accept the message or not. The increasingly widespread use of SaaS email service providers such as Exchange Online, G-Suite, Amazon SES, SendGrid and others is a challenge for email administrators. ABOUT EMAIL HEADERS. According to Section 10. You will be transferring management of the SPF from. A quick investigation from our side revealed the culprit: they had 'optimised' their SPF DNS records by flattening all the SPF include terms. Use an automated service that flattened the record and then keeps it updated. 141The SPF (Sender Policy Framework) redirect is a record modifier that points to a separate domain name containing an SPF record. And you can see down the page that the resolution of their.