Server :: Courier IMAPD Taking Lots Of Server CPU?
Feb 2, 2011
I am having weird issues with courier IMAPD, the load goes like crazy at times and users mail client just hangs! The server is having 4 GB RAM Dual Core and around 700 users connected to 143 (via netstat) and I see around same amount of imapd's in process list. Mailbox stays in SAN (fiber).
load is high: 105.52, 173.12, 113.05
iostat.txt
Linux 2.6.9-34.ELsmp 02/02/2011
avg-cpu: %user %nice %sys %iowait %idle
8.93 0.02 1.58 8.06 81.40
[Code]....
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Mar 25, 2010
I started to use mailboxes instead of maildirs on my server. My server is with imapd on slackware.I found out that by Thunderbird I just cannot create sub-folders in my imap directory. My users used to manage their mails into hierarchically organized subfolders.
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Aug 25, 2010
I setup a qmail on a Debian 5 Lenny server with courier-imap server. I can send mails but cannot receive mails. I altered /etc/init.d/qmail as follows.
Code:
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Apr 7, 2011
I'm trying to get my server back up to snuff. I'm using Debian Squeeze right now and I'm up and atom with apache, mysql, php, pureftpd, ssh, and I have squirrelmail installed.
My dilemma comes with the mail part of the whole ordeal, Postfix and Courier are installed, have their keys made, and for what I assume, are configured correctly. HOW do I make new virtual users? My domain points to this machine as well as my MX record for mail.mydomain.com.
I need IMAP and POP working. And upon the creation of new email users, will SquirrelMail interface with Postfix and Courier? When I installed SM I set it up for use with Courier.
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Feb 4, 2010
Im looking for a way to block emails that come into the mail server for users that are no longer on the domain. I see a lot of messages in the maillog for emails coming in for people that are no longer active users on the domain.
setup:
Using spamassassin if that matters.
Using Active Directory on a windows server.
I found postfix uses this "reject_unknown_recipient_domain" in /etc/postfix/main.cf but I am unsure where this would be used in courier.
Ive seen some hints here. But not sure how to adapt this for domain users.
[url]
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Mar 18, 2011
Does anyone know if there are only personal preferences between the two IMAP servers or does one of a slight advantage over the other? I've used Dovecot only in the past but my package manager loads tons of MySQL libraries with Dovecot which is a problem since that's not authorized on my server right now. I can either install it from source or try another application like Courier.
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Dec 19, 2009
how to install Courier IMAP server and they all say the same thing, but they keep giving me problems.URL... is a link to the page I'm working on.I created the user, edited sudoers manually since I can't effectivly use visudo in the terminal since I don't know how to save. I also made sure that I restarted after I edited it in order to make sure it took effect. I used su compileuser and just logging in as compileuser and opening a terminal. After I made the user and edited that file, I created the directory mentioned and ran the command to create .rpmmacros. After that I got to work on wgetting the files and installing them and what not. The first one compiled and installed and so did the last one. The command "rpmbuild -ta courier-imap4.6.0.tar bz2" would not go though properly. This one I need to run as a non-root user and I've tried using every way possible to be as distant from root as possible, but it still gives me this at the end.
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Jul 28, 2010
Using the following software:
Ubuntu Server 8.04
SquirrelMail 1.4.13
Postfix 2.5.1
Courier 0.59.0 (Courier-IMAP 4.3.1)
Apache2 2.2.8
I've installed a mail server per the instructions at [url].
Neither POP nor IMAP test successfully with the user that I just added after following the setup instructions.
This doesn't make any sense. I added the user to the mysql database:
Code:
And after I did that, I ran the postfix reload command. If I try to log in as firstuser@mydomain.com, which is the user I created during the setup and configuration process, it works fine.
I checked the virtual mail account's home folder, and under the mydomain.com folder, I only see a folder for firstuser. I'd create one for testuser manually, but I don't know if that'll work since it seems to contain a particular folder structure of its own.
Is there some other command that I have to run? I don't recall having to do anything additional when setting up firstuser.
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Mar 2, 2010
I have had a mailserver die when it still had email that the users hadn't downloaded. I have build a new server an tried to copy the mail across but this caused a issue where users were unable to download any new email.
Is it possible to make the old undelivered email available for download?
old server name lx0.hostname.com (dead) I can get to the data but not start the server. new server name lx1.hostname.com
Both systems were running qmail with courier.
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Jan 1, 2010
i followed this tutorial to the "T", [URL]. I am not able to login to the mailboxes with squirrelmail, it says "connection dropped by imap server" I used the whole address as a login just like it said to do. I can sucessfully authenticate with outlook express but it throws an error that say's [URL], no such file or directory. i can telnet into it remotely but when i type ehlo [URL] it just keeps showing all the 250 lines and wont let me generate a message.
from what i saw on the comments on the tutorial and googling there are many other people with this problem, however i found no solutions. This is fresh work and i have not touched any config files since finishing the tutorial
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Feb 2, 2010
In the last week email delivery had slowed down to taking approximately 24 hours and investigation has revealed that there were 45000 emails in the mailqueue. I flushed the mailqueue yesterday but mail delivery is slowing down again because emails are again being queued by the thousand.
The mails are mainly spam sent to ficticious users at a genuine domain hosted on the server.
My setup is running Courier IMAP with Postfix, Spassassin is installed along with Amavisd-new but I just don't understand why this has suddenly become a problem based on my setup not having changed for the last 6 months.
Should these spam emails be being discarded by spamassassin before reaching the mail queue? Are my discard score settings too high (6.9)?
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Jun 4, 2011
I am administrating a server with CentOS installed. It came with qmail and courier-imap preinstalled, and Plesk.I need to manually add email accounts outside of Plesk, because my 1-domain Plesk license only allows the creation of one email address (yes, it sucks).
When I say add email account I mean creating a new email address, have email for that address be stored in its maildir, and have a corresponding imap (and hipefully also pop3) account that will be able to read that mail. All this with virtual domains.I've already found out how to create the new email addresses for qmail, so that email for the new email address is being delivered correctly. Now I need to create the imap/pop3 accounts for courier.
For the qmail part, I create a folder in in /var/qmail/mailnames/virtualdomain.org/username and a maildir called Maildir inside it. This is how the first mail address was created by Plesk and i'd like to maintain the same structure. As I've said, the qmail part is already working, I need to get the courier-imap part to work. Ideally, it should accept login with both short (i.e. myuser) and long (i.e. myuser@virtualdomain.org) user names.
Currently the only authentication module that is enabled in courier-imap is authpsa, which is Plesk's authentication module.in order to add more authentication modules, do I just need to add them to the authentication module list in /etc/courierimap/imapd, or do I need to reinstall courier-imap with support for such authentication modules? I thought I would only need to add them to the list, but I've noticed that the /usr/lib/courier-imap/authlib/ folder only contains a binary called "authpsa". Does that mean that other authentication modules are not even installed? If so, can I install them without reinstalling courier?
The second question is, what would be the most recommended authentication module that would make it easiest to create new email addresses/accounts from the command line? I need to be able to write a shell scripts capable of creating a new email address with all that is needed, and I'd like to keep this script as simple as possible, so for example I'd avoid mysql-based authentication as it sounds rather complicated. And the last question is, if I do need to reinstall courier-imap, how can I install a package without recompiling it? Will my one existing mailbox keep working?
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Feb 23, 2010
Setup my postfix mail server and courier-imap/pop. My postfix server now is working with tls and saslauthd, I can send/receive email inside my domain as well as outside. However, I need two separate smtp and imap/pop3 server, I mean two machine - one with smtp function and one with imap/pop3 function working together.
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Dec 26, 2010
I am trying to set up a Mail Server -- Virtual Users with Postfix, PostfixAdmin, Courier, Mailscanner, ClamAV On CentOS 5.5 using this guide. These are the version and softwares I have used till now:-
[Code]....
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Mar 22, 2011
I got a new-old notebook from ebay, a sony vaio vgn-tt11. it is working really great with slackware and I can recommend it to everyone whose thinkpad got stolen ;-)I am trying to optimize everything I can and one thing is bothering me although I might be wrong about this. "top" is showing X server taking between 4-7% of the cpu even when I am not doing anything (no apps with running in the background). I remember that x server on the thinkpad did use much less cpu. but I checked that on thinkpad at least two years ago.
4-7% is (not) much and I would like to hear whether your X server is taking any cpu power and how much. do you have any ideas how to improve this or is this something I have to live with? I am using vanilla slackware 13.1, gnome slackbuild and kernel 2.6.38. I tried playing with Xorg.conf but it did not help at all. I activated "composite" extension through xorg.conf but nothing changed.
Code:
# lspci | grep -iE '(vga|display)'
00:02.0 VGA compatible controller: Intel corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:02.1 Display controller: Intel corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
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Oct 26, 2010
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Of all the choices I have--nfs, ftp, scp, rsync, samba--has anyone done any benchmarking to show which would be the fastest/most robust transfer protocol? I know nfs has slow write speeds for synchronous transfers. Asynchronous would be faster, but less robust. I'm leaning toward rsync since it performs md5sums to confirm the file transfers. (Remember if there's a 1 in a billion chance that a byte will get corrupted, then I'll have 20,000 corrupt bytes in the transfer.)
(2) Nautilus emblems
We use emblems in Nautilus to categorize files. The old and the new server have the same directory structure.Is there any way to copy the Nautilus emblems from the old server to the new server. What I want is that if a user had marked a particular file with a star on the old server, then that file would be marked with a star on the new server when he/she logs in.
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Pasting d my.cnf file-
# The following options will be passed to all MySQL clients
[client]
port= 3306
[code]....
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Code:
#################################################
# rsnapshot.conf - rsnapshot configuration file #
[code]....
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Code:
0-0 24789 1/7/7 C 0.10 3980 0 0.0 0.01 0.01 ::1 my.server.com OPTIONS * HTTP/1.0
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[code]....
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May 5, 2010
I'm setting up the Squirrelmail | impad | sendmail combination and so far everything appears in order but I'm getting a 'mailbox not found' error when I log into Squirrelmail. I've eliminated Squirrelmail by using another imap client (Mozilla Thunderbird) and getting the same error. It seems that the problem is with imapd.I've checked the logs and I can see only the successful login entries. Nothing else:
May 5 10:30:19 altair cyrus/imap[2602]: executed
May 5 10:30:19 altair cyrus/imap[2602]: accepted connection
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[code]....
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Httpd.conf
Timeout 20
KeepAlive Off
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<IfModule prefork.c>
code....
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