Check DNS SPF Records

Sender Policy Framework (SPF) records are used to specify who is allowed to send email for a domain.

Historically, SPF records could be published using the SPF or TXT resource record types (see RFC 4408. This changed with RFC 72089, which specifies that SPF records must be published as TXT resource records only.

DNS Check supports monitoring both the TXT and SPF resource record types:

SPF Record Check


Here are the fields that make up an SPF record:

Field Description Example
Name A fully qualified domain name (FQDN).
Type The DNS record type. Always set to "SPF". SPF
Value A string of text "v=spf1 -all"

DNS Zone File Examples

Here's an example of how an SPF record which uses the example values from this page's Fields section looks in a DNS zone file:

; Name           Type  Value     SPF   "v=spf1 -all"

The Name ends in a period in the above example, so it's a fully qualified domain name.

Alternatively, you can create an SPF record that's relative to the zone file's $ORIGIN. Here's an example of how to do this using the example values from this page's Fields section:

; Name           Type  Value
legacy           SPF   "v=spf1 -all"

Additional Resources

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