Wietse Venema skrev 2010-10-11 14:44:
Wietse Venema:
Patric Falinder:
Hi,
Recently I've noticed that my mailqueue is filled up with doube-bounce
messages that won't go away.
I can't remember it being this way since the beginning and I just
noticed it a couple of days ago.
Right now I have 193 messages in the queue and they're all from
double-bounce.
They are only in the queue for the time specified in
maximal_queue_lifetime that I have set to 3 days.
Before it was 5 days and then I had over 1000 messages in the queue..
If I do a postcat on a message I get this:
*** ENVELOPE RECORDS /var/spool/postfix/active/6322B10A46C ***
message_size: 256 236 1
0 256
message_arrival_time: Sat Oct 9 13:59:08 2010
create_time: Sat Oct 9 13:59:08 2010
named_attribute: log_message_origin=local
named_attribute: trace_flags=256
That is an address probe (triggered by the use of reject_unverified_sender
or reject_unverified_recipient). Postfix does one delivery attempt
and throws them away.
Apparently your Postfix queued a lot of address probes a few days
ago. If the messages are in the incoming or deferred queue, then
your queue manager isn't waking up to grab new mail. This can be
a symptom of broken timer support in virtualized environments.
Another observation:
Apparently the low-frequency $queue_run_delay (300s) timer still
works, so the queue manager picks up one message every 300s, but
your system's ZERO-DELAY timer support is broken, so the queue
manager does not pick up the next message immediately as it does
everywhere else.
Thus, you're limited to about 288 deliveries per day.
What OS platform is this? What about virtualization? What about
tick-less timer support? What Postfix version, any "improvements"
made by local users or helpful vendors? RedHat used to be pretty
good at breaking Postfix in surprising ways.
Wietse
I'm running Debian Lenny x64 with Postfix 2.5.5 with VDA patch.
It's virtualized on a VMWare ESX server.
Don't really know what tick-less timer support is so I guess I don't use
it unless it's standard in Debian!?
How do I fix the system's ZERO-DELAY timer?
Thanks a lot for the help Wietse!
-Patric
