Old 10th October 2007, 11:10
sjau sjau is offline
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Default SPF Record right?

Ok, I have been using a catch-all email address for a very long time... so whenever I needed to sign-up at some place (e.g. http://www.somedomain.com) I entered as email address: www.somedomain.com [at] roleplayer [dot] org.

That way I could easily track where my email address was leaking.

From time to time some people forged a roleplayer dot org email address and it was then bounced back... that wasn't that bad. However yesterday, within two hours I got over 160 such bounce backs ( http [column slash slash] t390[dot] greatnet [dot] de [slash] cgi-bin [slash] mailgraph [dot] cgi ).

For the moment I did now deactivate that catch-all email but as you can see, there are still a lot of rejected emails (although it's turning towards normal again).

I use the postfix integrated UCE mechanisms, greylisting and rbls but that didn't help much as you can see.

So I started setting up SPF (according to the howto) and I wonder now if my SPF entry is correct.

The SPF entry should do the following:
- bind roleplayer [dot] org to the IP
- say ok to any subdomain sending mail through
- also say ok to the hostname given by my ISP t390 [dot] greatnet [dot] de
- return false from any "roleplayer [dot] org" email that is not being sent through the ip address

Here's the SPF entry I added to the bind zone file:
roleplayer [dot] org. IN TXT "v=spf1 a mx ptr a:t390 [dot] greatnet [dot] de ~all"
of course [x] has to be replaced by the according character.
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Old 11th October 2007, 16:45
ebal ebal is offline
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if you need just a validation for you spf

you can try this http://www.kitterman.com/spf/validate.html

and here is a simply wizard http://old.openspf.org/wizard.html
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Old 11th October 2007, 18:06
falko falko is offline
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You can check your SPF record with the help of this wizard: http://old.openspf.org/wizard.html
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Old 11th October 2007, 18:25
sjau sjau is offline
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used the wizard to create it but wasn't sure if everything was right.
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