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Re: SPF Record ...

From: "Marc G(dot) Fournier" <scrappy(at)postgresql(dot)org>
To: Magnus Hagander <mha(at)sollentuna(dot)net>, Peter Eisentraut <peter_e(at)gmx(dot)net>, pgsql-www(at)postgresql(dot)org
Cc: "Marc G(dot) Fournier" <scrappy(at)postgresql(dot)org>, pgsql-core(at)postgresql(dot)org
Subject: Re: SPF Record ...
Date: 2006-11-17 13:16:40
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- --On Friday, November 17, 2006 10:34:19 +0100 Magnus Hagander 
<mha(at)sollentuna(dot)net> wrote:

> That's a bit harsh, really. There are a lot of environments where
> publishing SPF records are *not* harmful, and are *not* restricting the
> user. For example, any organisation that doesn't use SMTP for mail
> submission. I have 18,000 users that only everb submit email using RPC
> or http. We also permit SMTP with authentication over TLS on 587 for
> those few (I think there are 4 or 5 people out of the 18,000) that use
> IMAP/s. Publishing SPF records for this organisation was a big win, and
> it has noticably cut down the spam complaints we've received when
> spammers have forged from addresses from our domains.

The above was what I was thinking also ... where there is easy and absolute 
control over the domain in question (ie. all *legit* email will go 
through one of two servers ... I have my postfix setup on my desktop setup so 
that it relays *thru* the primary one, and its a very restricted list of email 
users involed), then adding an SPF doesn't hurt ...

> That said, I'm not asying that it's right for, given that
> it has the type of usage pattern that it does with a lot of
> "organizationally unrelated" users that all use SMTP for submission. Use
> the right tool for the job, as always...

As I answered Dave, I'm quickly starting to think that might be 
fairly difficult ... but, even then, spf allows for 'exceptions' (ie.,, etc) ... so for the very few actual 
mailboxes involved, it shouldn't be too difficult to do either ...

- ----
Marc G. Fournier           Hub.Org Networking Services (
Email . scrappy(at)hub(dot)org                              MSN . scrappy(at)hub(dot)org
Yahoo . yscrappy               Skype:        ICQ . 7615664
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