jittinan suwanrueangsri wrote:
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Dear sir
I assume these conditions are true.
1.sample domain: test.com <http://test.com>
2.test.com <http://2.test.com> has one mx is called mail.test.com
<http://mail.test.com>
3.mail.test.com <http://3.mail.test.com> host is down
if some one relay an email which sender is some...@test.com
<mailto:some...@test.com> ,recipients is some...@test.com
<mailto:some...@test.com> via one mailrelay server.After mailserver
recieve a message it try to connect to test.com <http://test.com> 's mx
,finally it will fail so mailserver keep a message for next retry but
it will faill every times until a message is expire.After that
mailserver will generate delivery status notification,send it back to
sender some...@test.com <mailto:some...@test.com> with hope to notify
sender that his/her message can not be delivered but It can not connect
to test.com <http://test.com> 's mx and retry until message is
expire.Default value for postfix queue expire time is 5 days if someone
send only 1 message which all situation are met these conditions.It will
stay in mailserver for 10 days.
Yes, this is correct behavior.
what 's happen if someone send 10,000
messages/day.Are there any solution ?
Solution to what? Where's the problem?
- If you send lots of mail, you must be prepared to accept
lots of bounces.
- If you don't want your users to send lots of mail, use a
policy service with per-user rate limits.
- If you don't want your users using "unauthorized" envelope
sender, use reject_sender_login_mismatch and friends.
- If your queue is full of mail you know will never be
delivered, use postsuper -d QUEUEID to delete it.
--
Noel Jones
