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Combine two spfs into one: Google Apps SPF + Campaign Monitor SPF =?

Trying to comb two spfs into one? Any thoughts? Thanks!

SPF A: v = spf1 include: _spf.google.com ~ all

SPF B: v = spf1 mx include: cmail1.com ~ all

What is A + B?

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1 answer

Let me break it:

v=spf1

It just says that the version of SPF is being used and that it is an SPF record.

 include:_spf.google.com

Examine the SPF rules at _spf.google.com (i.e., if the source goes against _spf.google.com, it will go against your site)

 ~all

A mild failure if none of these rules are matched (all will be a difficult failure that people usually avoid when setting up Google Mail in their domain)

 mx

Allow sending the source IP address as the domain in question if the source IP is present as an MX record in the domain.

 include:cmail1.com

Another example: this time against cmail1.com

Final result:

 v=spf1 mx include:_spf.google.com include:cmail1.com ~all

I used the SPF syntax page to put it all together.

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