[nylug-talk] Any postfix gurus available for consulting?

[Brian Gupta]

On Dec 4, 2007 2:00 PM, Gary Mort <gmlug at saplings.us> wrote:

> Adrian Sai-Wah TAM wrote:
> > And the said issue is easy to solve: you just write a program and feed a
> bunch of mail into the mail queue. So from the technical stand
> > point, no big deal.
> >
>
> Actually, no, if sending solicted mail in large quantities, there is the
> matter of dealing with:
>
> 1) Bounces
> 2) Removing dead email addresses from the queue
> 3) Correctly scaling back trying again of email so temporarily delayed
> mail is not affecting email that is most likely dead
> 4) Correctly scaling the try again parameters handle systems which
> reject the first attempt, but will accept the second attempt if done
> within 10 minutes and from the same machine(this one is a nightmare, as
> the default try again config is 15 minutes, not 10 iirc.  And postfix
> using a scaling system for when it tries again, ie the first time would
> be 15 minutes, if that fails than it's 30 minutes, than its 60, etc.
> Even if your first retry is within the time limit, if that one fails for
> some reason your not outside the loop.  Also a lot of people use
> multiple outgoing postfix servers with a shared queue, but the spam
> rejection routine on the receiving server is set to reject first, and
> only accept an incoming connection from the very machine which tried
> initially.  So if you have both systems trying in sequence, and email
> could never be delelivered)
> 5) Domain key signing of outgoing email
> 6) Proper SPF record updates
> 7) Segregating server processes so outgoing processing doesn't affect
> incoming processing
>
> etc etc etc
>
> Some of the above depends on the software behind postfix(ie customizing
> bounce addresses to detect what address bounced is a postfix config,
> using it and handling it depends on PHPList or whatever software your
> using)


>
> There is a very active postfix-users group,
> http://groups.yahoo.com/group/postfix-users/join  which might be a
> better place to look for someone who knows all of this out of the box(as
> opposed to those of us who can figure it all out, but would take time and
> likely would be mining the postfix users group for some of the answers)


Thanks Gary. You understand what I am asking. The challenge is to send a
fixed number of emails in as short a time as possible, without having
dropped messages. (Recipients will complain if their email is delayed, or
dropped).

Cheers,
-Brian
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-- 
- Brian Gupta

http://opensolaris.org/os/project/nycosug/