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SPF Record: Difference between revisions
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<indicator name="Faults">[[File:Menu-email.svg|link=:Category:Email|30px|Back up to the Email Category]]</indicator>
Also see [[DKIM]]
Many of the large email providers (Gmail, Yahoo, Office 365) are getting picky about accepting email that has no 'validation' mechanisms. Even if your email is not spam or junk they may treat it as so and either reject the message or put it in the recipients junk folder. ▼
SPF = Sender Policy Framework
From Wikipedia:
However, customers may be able to add a SPF record to their domain to help get their messages through. In short, an SPF record says which email servers are allowed to send messages for you. ▼
SPF allows the receiving mail server to check during mail delivery that a mail claiming to come from a specific domain is submitted by an IP address authorized by that domain's administrators. The list of authorized sending hosts and IP addresses for a domain is published in the DNS records for that domain.
▲Many of the large email providers (Gmail, Yahoo, Office 365) are getting picky about accepting email that has no 'validation' mechanisms. Even if your email is not spam or junk they may treat it as so and either reject the message or put it in the recipients junk folder.
Typically, our customers would use <code>smtp.aa.net.uk</code> to send email - however thought must be given to other servers that may also send email from your domain - eg you may have a 3rd party web server or some other service that sends email on our behalf - these would want to be included too.▼
▲However, customers
To cover the IP addresses of the A&A email servers, you can include <code>_spf_include.aa.net.uk</code>, eg:▼
▲Typically, our customers would use <code>smtp.aa.net.uk</code> to send email - however '''thought must be given to other servers that may also send email from your domain - eg you may have a 3rd party web server or some other service that sends email on our behalf - these would want to be included too.''' In these cases, you'd add the IP addresses as: ip4:x.x.x.x and/or ip6:xxxx:xxxx:xxxx::xxxx
▲To cover the IP addresses of the A&A email servers, you can include <code>_spf_include.aa.net.uk</code>, eg:
v=spf1 mx include:_spf_include.aa.net.uk ~all
This says to accept email from the mx records (<code>mx</code>) and A&A's published list of IP addresses (<code>include:_spf_include.aa.net.uk</code>) , everything else should be marked as possible junk (<code>~al</code>).▼
▲This says to accept email from the mx records (<code>mx</code>) and A&A's published list of IP addresses (<code>include:_spf_include.aa.net.uk</code>) , everything else should be marked as possible junk (<code>~
This is just a brief example of SPF, the record above will be useful to customers who only send email via <code>smtp.aa.net.uk</code>. There are lots of information and SPF 'generators' on the internet. The main thing to do is to test what you have added by looking at the headers of email that has been received by Gmail/O365 etc)
[[Category:Email]]
[[Category:Email Features]]
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