re: do you use SPF TXT RRs? (RFC4408)

Mailman List Mirror (Read Only)
1

We use SPF. Lots of the bigger guys require it. Along with DK/DKIM
signing.
In our spam weight based filtering, if it hardfails it drops it,
softfail(no spf record) we don't add or remove points at all. If it passes
SPF we remove a few points of the spam weight.

Nick Olsen
Network Operations
(877) 804-3001 x106

2

If it passes SPF we remove a few points of the spam weight.

I would rethink this practice. Many spammers publish SPF valid records these days precisely because of this.

Nathan

3

I've found lots of domains with +all which really should be -all since they were all spam.

Jared Mauch