On Thu, Mar 20, 2014 at 09:26:12PM +0530, KK Patnaik wrote:
> I am having issue with my SMTP servers where the mails are taking long time
> before the queue manager.
http://www.postfix.org/QSHAPE_README.html
http://www.postfix.org/TUNING_README.html
> Mar 20 10:43:55 smtp2 postfix/smtp[13548]: 25142124292D: to=<s...@gmail.net>,
> relay=aspmx.l.google.com[74.125.142.26]:25, delay=29217,
> delays=29775/1441/0.14/1.4, dsn=2.0.0, status=sent (250 2.0.0 OK 1395326635
> ac8si2519638icc.108 - gsmtp
Is this a bounce? Or a regular outbound message. With congested queues,
a single log entry is not that interesting, you need to understand the
average behaviour of the queue. You MUST analyze your logs.
- Where is most mail coming from?
- At what rate?
- Where is mail going?
- At what rate?
- What is the typical delivery latency (c+d in delays=a/b/c/d)?
- Are you generating bounces? Too many postmaster notices?
- ...
Understand what your system is doing, then ask for help.
> bounce_queue_lifetime = 0
> maximal_queue_lifetime = 0
These are rather unwise. Why have you disabled delivery retries?
> mydomain = smtp2.oursmtpmail.com
> myhostname = smtp2.oursmtpmail.com
> mydestination = $myhostname, localhost.$mydomain, localhost
> local_recipient_maps =
Why have you disabled recipient validation? You accept and then
bounce mail to invalid recipients, this congests your queue.
Consider setting:
# Empty, default is (effectively sub-domains of) $mydestination
relay_domains =
> notify_classes = bounce, delay, resource
On a congested mailserver, you're far better off setting:
# empty
notify_classes =
and monitor logs instead.
> smtpd_delay_reject = no
>
> smtpd_client_restrictions =
> permit_mynetworks, permit_sasl_authenticated,
> reject_unauth_destination, reject_unknown_sender_domain
>
With "smtpd_delay_reject = no", there is no login, recipient or sender
information at connect time, so this setting is pointless.
> smtpd_recipient_restrictions =
> permit_mynetworks,
> permit_sasl_authenticated,
> reject_unauth_destination
An RBL or two might help.
> smtpd_reject_unlisted_sender = yes
There are no unlisted senders, because local_recipient_maps is
empty, and you have no virtual_mailbox_domains.
--
Viktor.
