From: Robert Fitzpatrick (listswebtent.net)
Date: Tue Aug 29 2006 - 12:10:57 CDT

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On Tue, 2006-08-29 at 11:53 -0500, Noel Jones wrote:
> At 11:36 AM 8/29/2006, Robert Fitzpatrick wrote:
> >I implemented address verification using
> >smtpd_recipient_restrictions in
> >Postfix 2.3.1, now a heavy POP load on the destination
> >mail server. I
> >was planning to move my user lists to LDAP to relieve the
> >issue, but
> >googling I found a post by Weitse on the subject...
> >
> >http://archives.neohapsis.com/archives/postfix/2006-06/1485.html
>
> What does a heavy POP load have to do with postfix?
> The link doesn't appear to have anything to do with users
> lists in LDAP, and I am not Wietse.
> Generally speaking, any kind of database or dictionary user
> lookup is preferred to address verification probes. Use
> address verification probes as a last resort.

Sorry, wrong link...

 http://archives.neohapsis.com/archives/postfix/2004-11/2536.html

The POP load on the destination mail server has been experienced ever
since we implemented these verification parameters in Postfix. I am
assuming the increased POP load is due to Postfix verifying addresses,
no? I am looking for ways to alleviate that load. I will try your
suggestion of moving "reject_unverified_recipient".

Thanks for the help!

> Since address verification is fairly "expensive", you will
> get better results putting "reject_unverified_recipient" as
> far down the list as possible. It's not unreasonable to
> put it at the very end.
>

--
Robert

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