Hi,
I use courier 0.48.2, courier authlib 0.53 with mysql (3.23.58-4)
authentication. Also use Virus checking via the courier filter.
The whole system works fine, but recently notified that the incoming mails -
from the Internet - suffer considerable delay. Tracking the problem we found
out that it is caused by the huge amount of spam mails, where the local
domain is correct, but the addressee is wrong so courier gives back an:
550 User unknown
error message. This is all right, the only problem is that this response
arrives after a considerable time. It takes at least 8 secs, but sometimes
even 2 mins. The more unknown addressee in the mail the longer time passes to
the error message.I think courier checks them one by one.
This happens only with the local domain (mail.vpop.hu at my case), a bad
outside addressee or mistyped domain mails accepted at once. The good mails
accepted also without delay.
I tried the mysql select by hand with the same user what courier uses -> it
produces the empty select at once (0.00 sec) so this couldn't be the reason.
Checked the maillog - nothing, except for the above error message.
Could you help me please what should I check or do to eliminate this long
waiting time for the unknown addressee of the local domain?
Thanks in advance.
Zsolt Sandor
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