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- Maybe in reply to: Ward, Martin: "Programmatic access to the showq daemon/data"
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From: Victor Duchovni (no email)
Date: Tue Oct 02 2007 - 11:18:38 EDT
On Tue, Oct 02, 2007 at 09:40:16AM +0100, Ward, Martin wrote:
> > > I ask because I have a number of mail servers that regularly have
> mail
> > > queues 300,000 emails and a lot of these queues are bounces and
> > > double-bounces. Right now I have a simple script that someone wrote
> > > (possibly it even came with the Postfix installation since I didn't
> > > perform the installation) which runs the "postqueue -p" command,
> > > grep/awks out the message ID of the unwanted emails and runs
> > > "postsuper -d" for each ID.
> >
> > EEEEKS!
> >
> > Don't accept mail for bogus senders, so that you don't have
> > to send bounces later!
> >
> > Talk about fixing the wrong problem at the wrong end!
> >
>
> Unfortunately I didn't design or implement this system and I have
> to work with what I have been given, a complete rewrite of the
> System is not going to happen! As for bogus senders, this is
> something that will be looked at but how can I verify them?
Not bogus senders, incoming mail to bogus recipients, which you accept,
but then cannot deliver and thus bounce, generating gobs of backscatter
at joe-job victims and DoSing your own queue.
> How else can I use Postfix to verify the sender address?
The *recipient* address for downstream relay mail via:
reject_unverified_recipient
and suitable negative/positive cache lifetimes.
http://www.postfix.org/ADDRESS_VERIFICATION_README.html#recipient
-- Viktor. Disclaimer: off-list followups get on-list replies or get ignored. Please do not ignore the "Reply-To" header. To unsubscribe from the postfix-users list, visit http://www.postfix.org/lists.html or click the link below: <mailto:?body=unsubscribe%20postfix-users> If my response solves your problem, the best way to thank me is to not send an "it worked, thanks" follow-up. If you must respond, please put "It worked, thanks" in the "Subject" so I can delete these quickly.
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