> stopping the significant number of bots that use
addresses from my domain as mail-from as well as recipient.
I have a spoofing rule that blocks those regardless of SPF configuration. Of course
I've also had to add exceptions for a few sites and lists that 'legitimately'
From: Nigel Roberts [mailto:firstname.lastname@example.org]
Sent: Thursday, 22 July 2010 10:33 p.m.
To: Regan Murphy
Cc: Mark Foster; nznog(a)list.waikato.ac.nz
Subject: Re: [nznog] SPF Mail rejection
On Thu, 22 Jul 2010 at 10:02:07 +0000, Regan Murphy wrote:
At this stage I only use SPF on inbound to increase an
overall spam score - not block it outright.
The best thing about having SPF records for my domain and using SPF to block outright is
stopping the significant number of bots that use addresses from my domain as mail-from as
well as recipient. A quick couple of greps tells me this is about 10% of all inbound SMTP
connections to my mail server, which means 10% less load on dspam and delivery.
This may just be a luxury of having a vanity domain due to consequences that I haven't
thought of but it works well for me.