Courier POP3Login issues URGENT

cwihost

Member
Sep 9, 2001
24
0
306
We have been seeing problems with Couriers POP service. Really ever since switching from CPPOP. The fact that you can set the maximums on Couriers services seems good. However this also seems to inhibit proper functioning and tracking of problems when they arise.

We have been seeing pop3login hitting 300 - 400 processes, however they never seem to terminate and seems to clog up the POP 3 server causing timeouts.

We have tried changing the pop3 server limits really high and even low but always the amount of pop3logins hits the max set.

Can anyone provide me assistance on how to deal with Courier and these problems or does anyone know of an alternative to Courier that will work with Cpanel and better for a busy POP server?
 

cwihost

Member
Sep 9, 2001
24
0
306
I have also noticed that when doing the following

netstat -nap |grep pop3login

I see that the majority of the POP3Login processes are in CLOSE_WAIT status. Most of these never seem to go away. Only a handful are actually shown as ESTABLISHED.

Why is this. Is Courier not dropping these connections?
 

Rusky

Member
Nov 19, 2003
11
0
151
Courier issues

Hi

I have the same problem.

As processes does not close it is necessary to put a great number in configuration box, but this is not a solution.

Regards.
 

ralphlw

Member
Jan 2, 2008
5
0
51
Courier not closing connections

Has anyone figured out a solution to this as it is still causing me problems and the server already has maildir enabled.
 

sldubr

Member
Aug 31, 2007
10
0
51
Has anyone figured out a solution to this as it is still causing me problems and the server already has maildir enabled.
Has received this problem on other server.
Problems begin if LA more than 5-7.
Has anyone figured out a solution?
 

rvskin

Well-Known Member
PartnerNOC
Feb 19, 2003
400
1
168
Does any spamd error writing on /var/log/maillog? We got a box which spamd always write warning on maillog and delay pop3dlogin process to write on the log. Downgrade spamd to 3.2.3 fixed the issue.
 

luisp

Well-Known Member
PartnerNOC
Jan 17, 2003
57
0
156
Portugal
cPanel Access Level
DataCenter Provider
hello,

I also have this problem.. courier-imap processes doesnt close and keep running for days. This causes big loads on the server.

how to fix this?
 

sldubr

Member
Aug 31, 2007
10
0
51
hello,

I also have this problem.. courier-imap processes doesnt close and keep running for days. This causes big loads on the server.
how to fix this?
It was switched on dovecot. Thought a problem will dare. Became even worse.
There is a connection and collect pop3-login yet will not reach a limit. Thus at users connection breaks by timeout. :(