Yes, we use SPF in Exim here. Basically, we just reject anything that
gets an SPF fail. We have however also had to create a 'white list' of
external senders that send on our behalf to us, using our domain names. We
are rejecting several hundred thousand messages a week, about 50%. Most
of the rejects are spam using our domain names as the supposed sender.
Dan
Sent by: exim-users-bounces@???
To: exim-users@???
cc: (bcc: Dan Mitton/YD/RWDOE)
Subject: [exim] Exim and SPF
LSN: Not Relevant - Not Privileged
User Filed as: Excl/AdminMgmt-14-4/QA:N/A
Is anyone using SPF in Exim? I'm still trying to figure out a use for it.
One thing I thought of is a way of determining who is forwarding email.
If SPF doesn't match but the email is clearly not spam then the sending
host might be forwarding email and might make it on a list of legit
forwarders.
Might be a way of detecting spammers who use SPF by the hosts they
reference in their SPF record.
I might send out notices to those with too restrictive of SPF that their
email might bounce if the recipient uses hosted spam filtering.
What are the rest of you doing with SPF?
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