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How do I create an SPF record for my domain?

Sender Policy Framework (SPF) is a method by which the administrator of a domain explicitly specifies which mailservers are allowed to send mail for his domain. As this is just a TXT record that is put into the domains DNS zone file, the setup is fairly straightforward. A very basic SPF for might look like this: IN TXT "v=spf1 a mx ~all"

The above specifes that this is an SPF record for
v=spf1: a required header that indicates this is an spf record
a: the A record for is allowed to send email
mx: the MX record for is allowed to send email
~all all other mailservers trying to send mail will return a code of "softfail". The mail will still go through, however it will be a suspect message

If you wished to allow another server to send mail through that had the hostname of, you would modify the record thusly: IN TXT "v=spf1 a mx ~all"

Also, if you wish to give a hard fail, and only allow those servers to send mail, the record would look like: IN TXT "v=spf1 a mx -all"

If you wish to generate SPF records for a domain, use the SPF Setup Wizard

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