Re: SRS and Callbacks

On Mon, 15 Jan 2007, Chris Sweeney wrote:

> OK I have to ask for help now.  I have a user that is unable to send
> email because of what I consider broken call back.  When this particular
> place does call back its coming from a real email address instead of a
> <> null address.  In this case when you send email to

Yup.  That is real broken.  Unclear on the concept, even.

> [email protected] it calls back with
> [email protected] Is there away to get around this
> broken call back problem?

Pymilter has a feature to work around such braindamage.  It is called
banned_users, and whenever the local part is one of the banned_users,
the MAIL FROM is considered equivalent to <>, including requiring
a valid SRS sig in RCPT.  I usually include 'postmaster' in the
banned_users, and you would include 'sender_verification'.  Of course,
this means that postmaster@anydomain can't send me email directly.
This is usually not a problem because postmaster is normally redirected to
some other user, who responds from that account.

    self.is_bounce = (f == '<>' or t[0].lower() in banned_users)

'Banned_users' is maybe not the best name for the config option, but
that is in effect what it does.

-- 
	      Stuart D. Gathman <[email protected]>
    Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
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