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Merging SPF records

  • Updated on Jul 13, 2026
  • Published on Apr 10, 2026
  • 1 minute(s) read
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On some rare instances, users may require an extensive list of SPF Records for their Emails and discover the 255-character limitation in place.

To bypass this limitation and increase the amount of records that can exist against a domain is to merge multiple records together using the "include" feature of the SPF ruleset.

The example below is of an existing record that needs to be modified for a list of IPs.

example.com.au. TXT "v=spf1 +a +mx +ip4:221.121.129.3 -all"

We will need to create a new TXT Record in our DNS Zones like so:

_spf1 TXT "v=spf1 +ip4:221.121.129.2 +ip4:221.121.134.34 include:m.google.com ~all"

Once the new record is created, we can modify the original record and use our new TXT Record above as an ‘include’ (noted as include:_spf1.example.com.au)

example.com.au. TXT "v=spf1 +a +mx +ip4:221.121.129.3 include:_spf1.example.com.au -all"

After this DNS change has been made and has propagated successfully, the SPF records will now include both sets of rules.