RE: newbie: spf record and including smtp web forms

Tania Lazib (OnCourse) wrote on 12/6/2007 7:38:42 AM:

> I just want to check if I have done this right - what i was about to
> publish is this:
> 
> "v=spf1 mx ptr include:cmail1.com include:aspmx.googlemail.com ~all"

	Very few people need "ptr" ... how many mail servers do you have
that have a hostname of *.oncourse4wd.com (for the reverse DNS lookup)?
My guess is you can omit that...see below, especially "If at all
possible, you should avoid using this mechanism in your SPF record...":

http://www.openspf.org/SPF_Record_Syntax#ptr

	Other than that the syntax looks valid.

> What I was wondering about is - as I use google apps to process my
> emails but have an online web form which uses the web hosting smtp -
> do I add this as an a record:
> 
> "v=spf1 a:smtpmail.active24.com mx ptr include:cmail1.com
> include:aspmx.googlemail.com ~all"

	You would need to account for any mail server that sends mail
for your domain, so if smtpmail.active24.com does that, then yes.

	Remember to change ~all to -all when you're done testing.

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SPF FAQ: http://www.openspf.org/FAQ