Jun 12, 2014 · At its simplest, the SPF TXT record contains a version indicator, allowed IPs and an authorization type. -all means only this IP is authorized to send mail for the domain. Of course, there are other ways to define authorized IP addresses. Using "v=spf1 mx -all" authorizes any IP that is also a MX for the sending domain. SPF 记录实际上是服务器的一个 DNS 记录，原理其实很简单：. 假设邮件服务器收到了一封邮件，来自主机的 IP 是 173.194.72.103 ，并且声称发件人为 [email protected] 。. 为了确认发件人不是伪造的，邮件服务器会去查询 example.com 的 SPF 记录。. 如果该域的 SPF 记录设置 ...Published in the DNS, a DMARC policy allows a domain owner to indicate that their email messages are protected by SPF and/or DKIM and is used to determine what is done to non-compliant email:. p=none is used to collect feedback and gain visibility into email streams without impacting existing flows. It’s a crucial first step. p=quarantine …SPF Record Syntax. At its simplest, the SPF TXT record contains a version indicator, the allowed IP addresses for the domain, and an authorization type. 198.51.1.137 is the allowed sending IP address (an IPv4 address), and. -all is an authorization type that asserts that only the IP address 198.51.1.137 is authorized to send mail for the domain.The " all " mechanism () all. This mechanism always matches. It usually goes at the end of the SPF record. Examples: v=spf1 mx -all. Allow domain's MXes to send mail for the domain, prohibit all others. v=spf1 -all. The domain sends no mail at all.Using incorrect syntax: The syntax of an SPF record is specific and must be entered correctly. Using incorrect syntax can cause email servers to fail to recognize the SPF record, resulting in email messages being marked as suspicious or rejected. Using overly restrictive rules: If your SPF record is too restrictive, it may prevent legitimate ...Sep 1, 2022 · SPF record syntax. SPF syntax, as defined in Internet Engineering Task Force RFC 7208, specifies three components in SPF records: mechanisms, qualifiers and modifiers. Mechanisms are the techniques SPF can use to verify that a specified domain is authorized to send email. A mechanism is said to match if some identified condition is met. Some receivers may attempt to interpret SPF records despite syntax errors. Therefore, an SPF record that is not well constructed can create inconsistent ...SPF: SPF Record Syntax. Sender Policy Framework. SPF Record Syntax. Showing revision 1. SPF syntax: a quick overview. Domains define zero or more mechanisms. …Jun 8, 2023 · Here SPF record is explained in two categories; let’s start by discussing the first one, i.e., SPF basic syntax. We’ll understand this with the help of the following SPF record example-. v=spf1 ip4=192.158.1.38 ip4=192.158.2.30 include:vendorsender.net ~all. Where; v= spf1 specifies that it’s an SPF record, and all SPF records begin with ... Welcome to MxToolbox’s SPF record generator. This tool can help you generate a SPF Record or modify your current SPF Record as well as to check the modified record has the correct syntax. If you want to modify an existing SPF Record from a domain, please look for the domain in question. SPF record generator to help with email delivery problems.Mar 2, 2021 ... SPF and Sender ID are not the same. Both validate e-mail sender addresses, and both use similar methods to do so. Both publish policy records in ...Feb 20, 2024 ... An SPF record is a TXT record in the DNS starting exactly with "v=spf1", followed by an array of mechanisms and/or modifiers. An SPF check ...SPF-Eintrag: Grundlegende Syntax. Ein SPF-Eintrag ist eine Art DNS-Eintrag, der alle IPs auflistet, die eine E-Mail über eine bestimmte Domain senden dürfen. Wenn ein Server außerhalb dieser Liste versucht, eine E-Mail über diese Domain zu senden, wird sie als nicht autorisiert markiert und vom Postfach des Empfängers zurückgewiesen.In the following example, the client IP is 1.2.3.4 and the current-domain is example.com. "v=spf1 redirect=example.net" If example.net has no SPF record, that is an error; the result is unknown. Suppose example.net's SPF record were "v=spf1 a -all". Look up the A record for example.net. If it matches 1.2.3.4, return allow.Learn how to create and verify SPF records for your domain using DNS TXT records. Find out the different elements, mechanisms, qualifiers and modifiers of SPF records with real …Are you looking for a fun and effective way to expand your vocabulary and improve your syntax skills? Look no further than free sentence building worksheets. These handy resources ...Common SPF Issues. SPF Record Syntax. In general, an SPF record is defined using a type of TXT record (not to be confused with the legacy SPF file type record). Example of an SPF Record: v=spf1 a ip4:199.167.224.0/22 ~all. Check your SPF record using this third-party tool with your domain: Check SPF Record .Sender Policy Framework (SPF) is a system of email authentication. Cookies on this site. We use some essential cookies to make this website work. We’d like to set additional cookies to understand how you use our website so we can improve our services. Accept optional cookies. Reject optional cookies ...In a year tied for the warmest on record globally, the US was hit with costly hurricanes, wildfires, storms and drought. The year 2020 broke disaster records across the country in ...An SPF record is a kind of TXT record published in a DNS zone file, containing a list of all the authorized mail servers that can send emails on behalf of your domain. It is an implementation of SPF that …The SPF syntax incorporates specific mechanisms, such as ‘all,’ ‘ip4,’ ‘ip6,’ ‘a,’ ‘mx,’ ‘ptr,’ ‘exists,’ and ‘include.’ ... Improperly configured SPF records also lead to emails being dropped. Therefore, it is advisable to use SPF validators to check for an ‘all’ tag, evaluate the whole SPF record, and ...After test email by many email testing online, and since I have to put just those authorized mail servers in the record, I have kept it to point just to Godaddy servers like this. v=spf1 include:secureserver.net -all. Where all emails got 9.5/10 in email testers and that is great! Hi, I want to ensure if SPF record has the proper information ...The SPF record all tag is the last mechanism of a valid SPF TXT record (a string of TXT or text record) published on your domain’s DNS. Any other syntax at the end of SPF DNS records is ignored. It instructs recipients’ servers to take action on emails from your domain name that fail SPF authentication checks.. It’s used to add a list of ipv4 or ipv6 IP … In this article, we explain SPF record syntax and provide SPF record examples of common configurations. We also show how to set up an SPF record using the AWS Route 53 web service as an example provider. However, this article is not otherwise AWS-specific, and the ideas presented should be useful in deploying SPF on any provider. Welcome to MxToolbox’s SPF record generator. This tool can help you generate a SPF Record or modify your current SPF Record as well as to check the modified record has the correct syntax. If you want to modify an existing SPF Record from a domain, please look for the domain in question. SPF record generator to help with email delivery problems. SPF Resources. Refer to RFC 7208 for details; Common SPF syntax errors; Including IP addresses in your SPF record. There are two IP address versions you may need to include in your SPF record: IPv4 and IPv6. Most organizations and ESPs use IPv4 addresses. IPv6 addresses are not widely used at this time. IPv4 addresses look similar to: 50.201.69.200SPF: SPF Record Syntax. Sender Policy Framework. SPF Record Syntax. Showing revision 1. SPF syntax: a quick overview. Domains define zero or more mechanisms. …What is a DKIM record? A DKIM record stores the DKIM public key — a randomized string of characters that is used to verify anything signed with the private key. Email servers query the domain's DNS records to see the DKIM record and view the public key. A DKIM record is really a DNS TXT ("text") record.Feb 8, 2016 · SPF record syntax might look complicated and confusing at first, but it is fairly easy to understand once you know the basics. Let’s look at a breakdown of the key elements (also called “mechanisms”) in an example SPF record entry of v=spf1 a mx include:spf.mtasv.net include:_spf.createsend.com ~all. The first thing to note is the syntax ... Hackers use domains without SPF configuration. How to avoid mail delivery issues by configuring SPF and DMARC. Sender Policy Framework (SPF) and DMARC explained by ChatGPT. Why you need DMARC, SPF and DKIM. English. The SPF Record Lookup and Check is a diagnostic tool that acts as a Sender Policy Framework (SPF) record lookup …SPF records safeguard your domain’s reputation and enhance email deliverability by authorizing specific servers to send emails on your behalf. Remember to follow the correct SPF record syntax, test your SPF record for accuracy, and avoid common mistakes to create an effective and efficient SPF record.SPF record syntax. An SPF record is a single string of text published on the domain in the DNS. All SPF records start with exactly "v=spf1", followed by a series …An SPF record syntax comprises a version number, qualifiers, and modifiers. It is a TXT file stored on the Domain Name System. A DNS translates a hostname (e.g., …A receiving email server is unable to find the SPF record for the domain listed; the SPF record does not have the correct syntax; the IP address is not on the list specified in the SPF record; If any of the statements above are true, SPF authentication will respond with one of the following results and then is passed on to DMARC: none; neutral ...Sep 5, 2022 · In your SPF record syntax, the “include” mechanism indicates records to convey your email server to check for the records that match against the domain specified in the “include” line. SPF “include” points to a domain whose SPF records will be queried when checking whether the sending IP is allowed or not. If the sending IP address ... SPF Syntax Structure. Any typical SPF record example includes tags such as the ones listed below:. a: This tag helps one validate the IP address that the sender has used to send an email from their domain.If it matches the sender’s IP address completely, one can rest assured that it is authentic.; mx: Like the previous mechanism, this too authenticates the …This service was brought to you by ORF, our award-winning email security solution for Microsoft® Exchange and IIS SMTP servers. Award winning e-mail security and monitoring software for Microsoft Exchange and IIS. Fully scalable from SMB to enterprise with a budget-friendly price.Does a valid SPF record exist? An SPF record was found for the domain oeschberghof.com. The SPF record for oeschberghof.com is valid. The syntax check of the SPF record shows no obvious errors. Which IP-s are legitimate to send emails? In total, 8 IP address(es) were authorized by the SPF record to send emails. The SPF record …Are you looking for a fun and effective way to expand your vocabulary and improve your syntax skills? Look no further than free sentence building worksheets. These handy resources ...SPF Record: Basic Syntax. An SPF record is a type of DNS record that lists all the IPs permitted to send an email using a specific domain. If any server outside the list tries to send an email using that domain, it’ll be marked as unauthorized and rejected by a recipient’s mailbox. Thus, organizations must create SPF records for cybersecurity.Many digital video recorder (DVR) users look for ways to transfer recorded programs to their computer hard drive. No matter what type of computer you have, a video capture device s...What is a DKIM record? A DKIM record stores the DKIM public key — a randomized string of characters that is used to verify anything signed with the private key. Email servers query the domain's DNS records to see the DKIM record and view the public key. A DKIM record is really a DNS TXT ("text") record.Retrieves SPF records for the specified domain name and determines if the record is valid. Domain name: NOTE: The domain is everything to the right of the '@' in the e-mail address. ... This test is for checking the syntax of records before you publish them. The domain is used only for mechanisms such as a bare 'a' mechanism that have an ...SPF record syntax. An SPF record is a single string of text published on the domain in the DNS. All SPF records start with exactly "v=spf1", followed by a series of "terms". Note that the version part "v=spf1" is mandatory: everything else like "v=spf2" would render the SPF record invalid and cause the receiving server to ignore the record.SPF Resources. Refer to RFC 7208 for details; Common SPF syntax errors; Including IP addresses in your SPF record. There are two IP address versions you may need to include in your SPF record: IPv4 and IPv6. Most organizations and ESPs use IPv4 addresses. IPv6 addresses are not widely used at this time. IPv4 addresses look similar to: 50.201.69.200The most common modifier is “redirect”, which is used to replace the SPF of a domain with the SPF of another domain. It’s very useful in case you want to apply the same SPF record to different hosts/domains. It’s used like this: “redirect=exampledomain.com”. This means that your domain will use the same SPF as “exampledomain.com”.Apr 9, 2019 · The most common modifier is “redirect”, which is used to replace the SPF of a domain with the SPF of another domain. It’s very useful in case you want to apply the same SPF record to different hosts/domains. It’s used like this: “redirect=exampledomain.com”. This means that your domain will use the same SPF as “exampledomain.com”. SPF Record Checker. This site allows you to easily check and validate an SPF record, and also explains each of the parts of the record and their effect on email handling. Check a site.While home values continued to climb in May, home sales declined for a fourth consecutive month. Good morning, Quartz readers! US median home prices hit a record high. While home v...Feb 8, 2024 ... Your domain's SPF record lists the domains or IP addresses of services that are authorized to send emails on your behalf. By including our ...Although we’ll use AWS, the syntax of SPF is the same regardless of which DNS provider you choose. First, access the Route 53 panel via the AWS web console and either create a record set or ...SPF Record Syntax. At its simplest, the SPF TXT record contains a version indicator, the allowed IP addresses for the domain, and an authorization type. 198.51.1.137 is the allowed sending IP address (an IPv4 address), and. -all is an authorization type that asserts that only the IP address 198.51.1.137 is authorized to send mail for the domain.The SPF syntax incorporates specific mechanisms, such as ‘all,’ ‘ip4,’ ‘ip6,’ ‘a,’ ‘mx,’ ‘ptr,’ ‘exists,’ and ‘include.’ ... Improperly configured SPF records also lead to emails being dropped. Therefore, it is advisable to use SPF validators to check for an ‘all’ tag, evaluate the whole SPF record, and ... Welcome to MxToolbox’s SPF record generator. This tool can help you generate a SPF Record or modify your current SPF Record as well as to check the modified record has the correct syntax. If you want to modify an existing SPF Record from a domain, please look for the domain in question. SPF record generator to help with email delivery problems. Python is a popular programming language known for its simplicity and versatility. It is often recommended as the first language to learn for beginners due to its easy-to-understan... SPF Record Syntax. At its simplest, the SPF TXT record contains a version indicator, the allowed IP addresses for the domain, and an authorization type. 198.51.1.137 is the allowed sending IP address (an IPv4 address), and. -all is an authorization type that asserts that only the IP address 198.51.1.137 is authorized to send mail for the domain. SPF record: Google Workspace only. If all email from your organization is sent using Google Workspace only, copy this line of text for your SPF record: v=spf1 include:_spf.google.com ~all. Next steps. Go directly to the next step, Add your SPF record at your domain provider. SPF record: Google Workspace plus other senders Jan 31, 2024 ... How to Include Multiple SPF Records in 1 TXT Record · Declaration: Start your SPF record with v=spf1 (don't use this again in the rule — it must .....Does a valid SPF record exist? An SPF record was found for the domain immigration.gov.lk. The SPF record for immigration.gov.lk is valid. The syntax check of the SPF record shows no obvious errors. Which IP-s are legitimate to send emails? In total, 2 IP address(es) were authorized by the SPF record to send emails. The SPF record analysis was ...The SPF checker will search for an SPF record in the DNS records for your domain, display the SPF record if one is found, and validate the record for any errors. ... Lookup, …SPF: SPF Record Syntax. Sender Policy Framework. SPF Record Syntax. Showing revision 18. (Disclaimer: this page serves as an introduction / quick overview of SPF … Viewed 26k times. 22. I have read through the documentation but the difference is still not very clear to me. My understanding is: 1) include: will allow the IPs listed for the specified domain, and also any additional domains listed in that domain's own SPF records. 2) a: simply allows IPs listed for the specified domain. Learn how to write an SPF record with a version number, expressions, qualifiers and mechanisms. See the meaning and examples of each element of an SPF record syntax and the difference between directives, qualifiers and mechanisms. An SPF record is added to your domain's DNS zone file as a TXT record and it identifies authorized SMTP servers for your domain. TXT @ "v=spf1 a include:_spf.google.com ~all". If you are utilizing the DigitalOcean DNS Manager, make sure to wrap the SPF record with quotes. The following table provides an explanation of the …Apr 9, 2019 ... a: the letter “a” means that the host is authorized to send the emails of the domain. Remember that the domain is already specified in the first ...An SPF record is a line of plain text that includes a list of tags and values. The tags are called mechanisms. The values are typically IP addresses and domain names. An SPF record is added to your domain provider in the form of a DNS TXT record. Learn more About TXT records. SPF records can have up to 255 characters.Feb 8, 2024 ... Your domain's SPF record lists the domains or IP addresses of services that are authorized to send emails on your behalf. By including our ...SPF: SPF Record Syntax. Sender Policy Framework. SPF Record Syntax. Showing revision 7. THIS IS WORK IN PROGRESS. Domains define zero or more mechanisms. …The easiest is using the suggested record provided or an SPF generator. By learning basic SPF record syntax, resolve SPF issues easily or add further ...A colon-separated list of names. Unrecognized flags MUST be ignored. The defined flags are as follows: “y” – this domain is testing DKIM (test mode) “s” – verifiers MUST check for domain alignment (strict mode) Utilize dmarcian's DKIM Validator diagnostic tool to validate the content of DKIM records, and learn why that is important.Does a valid SPF record exist? An SPF record was found for the domain oeschberghof.com. The SPF record for oeschberghof.com is valid. The syntax check of the SPF record shows no obvious errors. Which IP-s are legitimate to send emails? In total, 8 IP address(es) were authorized by the SPF record to send emails. The SPF record …The syntax check of the SPF record shows no obvious errors. Which IP-s are legitimate to send emails? The SPF record contains a reference to external rules, which means that the validity of the SPF record depends on at least one other domain. A detailed list of the rules used externally can be found in the analysis result.To create a TXT record to replace an SPF record: Open the Route 53 console. Choose Hosted zones. Select the domain of the SPF record. Copy the value of the SPF record, and then choose Create record. For Routing policy, choose Simple routing. Choose Next. Choose Define simple record. For Record name, specify a name.SPF Record Syntax. Domains define zero or more mechanisms. Mechanisms can be used to describe the set of hosts which are designated outbound mailers for the domain. all. …With an SPF record in place, Internet Service Providers can verify that a mail server is authorized to send email for a specific domain. An SPF record is a DNS TXT record containing a list of the IP addresses that are allowed to send email on behalf of your domain. ... SPF Record Syntax. SPF and DMARC for Email. By itself, SPF can associate a ...SPF record syntax. An SPF record is a single string of text published on the domain in the DNS. All SPF records start with exactly "v=spf1", followed by a series of "terms". Note that the version part "v=spf1" is mandatory: everything else like "v=spf2" would render the SPF record invalid and cause the receiving server to ignore the record.Email authentication technologies SPF and DKIM were developed over a decade ago in order to provide greater assurance on the identity of the sender of a message. ... DMARC records follow the extensible “tag-value” syntax for DNS-based key records defined in DKIM. The following chart illustrates some of the available tags: Tag Name Purpose ... SPF syntax: a quick overview. Domains define zero or more mechanisms. Mechanisms can be used to describe the set of hosts which are designated outbound mailers for the domain. Mechanisms can also be used to describe other kinds of email policy; for example, that all legitimate mail originating from a certain domain is GPG-signed, or has Habeas ... The " all " mechanism () all. This mechanism always matches. It usually goes at the end of the SPF record. Examples: v=spf1 mx -all. Allow domain's MXes to send mail for the domain, prohibit all others. v=spf1 -all. The domain sends no mail at all.In the following example, the client IP is 1.2.3.4 and the current-domain is example.com. "v=spf1 redirect=example.net" If example.net has no SPF record, that is an error; the result is unknown. Suppose example.net's SPF record were "v=spf1 a -all". Look up the A record for example.net. If it matches 1.2.3.4, return allow.SPF Record: Basic Syntax. An SPF record is a type of DNS record that lists all the IPs permitted to send an email using a specific domain. If any server outside the list tries to send an email using that domain, it’ll be marked as unauthorized and rejected by a recipient’s mailbox. Thus, organizations must create SPF records for cybersecurity.That’s the basics of how SPF verification works to stop spoofing and ensure delivery of legitimate mail. Next let’s look at the syntax format. SPF Record Format and Syntax. SPF records have a defined syntax and format that receiving servers rely on to interpret them correctly: The record is a TXT type in DNS; Must start with “v=spf1”That’s the basics of how SPF verification works to stop spoofing and ensure delivery of legitimate mail. Next let’s look at the syntax format. SPF Record Format and Syntax. SPF records have a defined syntax and format that receiving servers rely on to interpret them correctly: The record is a TXT type in DNS; Must start with “v=spf1”The Exists SPF record syntax does a DNS A record search for the domain provided. A successful match is achieved only if a valid A record is located and that’s independent of the lookup limit. 8. INCLUDE. The Include SPF record syntax lets you add ipv4 or ipv6 IP addresses of vendors who send emails on behalf of your organization or its ...The Exists SPF record syntax does a DNS A record search for the domain provided. A successful match is achieved only if a valid A record is located and that’s independent of the lookup limit. 8. INCLUDE. The Include SPF record syntax lets you add ipv4 or ipv6 IP addresses of vendors who send emails on behalf of your organization or its ...you have exactly 1 SPF record on your domain; the record's syntax is correct; the total number of DNS lookups can't exceed 10. Otherwise, use Safe SPF to fix it. Use Safe SPF to fix the SPF PermError: Too Many DNS Lookups issue. You can use our free SPF record checker to check if your SPF record has any issues. Monitoring SPF …SPF record syntax. An SPF record is a single string of text published on the domain in the DNS. All SPF records start with exactly "v=spf1", followed by a series of "terms". Note that the version part "v=spf1" is mandatory: everything else like "v=spf2" would render the SPF record invalid and cause the receiving server to ignore the record.ETF strategy - SYNTAX STRATIFIED TOTAL MARKET II ETF - Current price data, news, charts and performance Indices Commodities Currencies Stocks
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The domain does not have an SPF record or the SPF record does not evaluate to a result: Accept: neutral: The SPF record specifies explicitly that nothing can be said about validity: Accept: pass: The SPF record designates the host to be allowed to send: Accept: fail: The SPF record does not designate the host to be allowed to send: Reject: softfail Aug 2, 2023 · SPF records safeguard your domain’s reputation and enhance email deliverability by authorizing specific servers to send emails on your behalf. Remember to follow the correct SPF record syntax, test your SPF record for accuracy, and avoid common mistakes to create an effective and efficient SPF record. A Sender Policy Framework (SPF) is a DNS record, part of a domain’s DNS zone, that declares which domains and hosts can or cannot send emails on behalf of a domain. Practically, this public record can contain two parts – a list of authorized domains and a list of forbidden senders. On its own, the standard email-sending protocol ( SMTP ...Retrieving one or all existing SPF Records using the API requires specific syntax depending on whether you are using REST or SOAP.An SPF record is added to your domain's DNS zone file as a TXT record and it identifies authorized SMTP servers for your domain. TXT @ "v=spf1 a include:_spf.google.com ~all". If you are utilizing the DigitalOcean DNS Manager, make sure to wrap the SPF record with quotes. The following table provides an explanation of the …La syntaxe de l'enregistrement SPF comprend plusieurs éléments : directives, qualificatifs et mécanismes. Les directives constituent la première partie de la syntaxe d'un enregistrement SPF. Elles indiquent comment interpréter le reste de l'enregistrement. Trois directives peuvent apparaître dans un enregistrement SPF : …For US Federal Cloud with DISA Impact Level 5, see SPF Record Syntax. For United Kingdom Government Cloud, see SPF Record Syntax . Note: If your organization is already using the Oracle Cloud to service your email needs, …EasyDMARC’s SPF Record Validator tool allows you to check whether your SPF record is valid or not before publishing it in your DNS to avoid any typos and/or misconfiguration. It checks for syntax errors, validates the record's elements, and checks for previously published SPF records. Our SPF record testing tool also advises on optimizing the ...Sep 5, 2022 · In your SPF record syntax, the “include” mechanism indicates records to convey your email server to check for the records that match against the domain specified in the “include” line. SPF “include” points to a domain whose SPF records will be queried when checking whether the sending IP is allowed or not. If the sending IP address ... Jeder SPF-Record beginnt mit einer Versionsnummer; die aktuelle SPF-Version mit "v=spf1". Es folgen beliebig viele Ausdrücke, die in der Reihenfolge von vorne nach hinten ausgewertet werden. Die meisten Ausdrücke sind dabei sog. Direktiven, die die Autorisierung des Versenders definieren, und bestehen aus einem optionalen Qualifikator …La syntaxe de l'enregistrement SPF comprend plusieurs éléments : directives, qualificatifs et mécanismes. Les directives constituent la première partie de la syntaxe d'un enregistrement SPF. Elles indiquent comment interpréter le reste de l'enregistrement. Trois directives peuvent apparaître dans un enregistrement SPF : …The price of heating oil in the United States reached another record high this week. Heating oil is now over $6 a gallon in four states. Heating oil prices have reached another rec...The easiest is using the suggested record provided or an SPF generator. By learning basic SPF record syntax, resolve SPF issues easily or add further ...All SPF mechanisms, including include, can be used multiple times, separated by spaces: "v=spf1 include:_spf.google.com include:otherdomain.com -all" Evaluation of include works this way:. If the included data returned PASS, then the include itself generates a result (for example, include:foo.bar generates a PASS, but -include:foo.bar generates a FAIL).. If …The syntax check of the SPF record shows no obvious errors. Which IP-s are legitimate to send emails? The SPF record contains a reference to external rules, which means that the validity of the SPF record depends on at least one other domain. A detailed list of the rules used externally can be found in the analysis result..