Category Archives: Exim

Useful Exim CheatSheet for Devs and System Administrators

This are some useful basic exim commands, compiled into what we call ‘Exim CheatSheet’. This are super useful to manage exim and troubleshoot general email errors from the Linux terminal. Top 17 Useful Exim Commands List all messages in the exim mail queue exim -bp Get the total number of emails in the queue exim -bpc Show a summary of… Read more »

Linux: Exim Remove All messages From the Mail Queue

How can I remove all the messages from the Exim mail queue from command line? That is a question made by many jr system administrators, webmasters and developers. Sometimes you need to clean  or remove all the messages on Exim mail queue, you can do it either from a web interface like Web Host Manager if you are using cPanel. Or… Read more »

How to install CMQ on cPanel

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ConfigServer Mail Queues aka CMQ, is a server side app created by configserver.com. It allows you to manage your Exim Mail Queue with a very useful and powerful GUI from WHM control panel. Today you will learn how to install CMQ on cPanel servers. ConfigServer Mail Queues can be useful for SysAdmins and Developers who need to: Determine causes of email… Read more »

List all IMAP and POP email accounts on a cPanel server

This is a quick hack to get your IMAP and POP3 email accounts that are active on a cPanel server, from all the existing domains. If you ever need to list all your mail boxes that are currently working with the IMAP or POP3 protocol, then run this scripts: To get all your IMAP mailboxes cat /var/log/maillog | zcat /var/log/maillog-*… Read more »

Warning: fd limit (ulimit -n) is lower than required under max. load

This happened on a recent cPanel server. Dovecot was showing this error message while restarting the service: Starting Dovecot Imap: Warning: fd limit (ulimit -n) is lower than required under max. load The fix was quick and easy. You just need to reconfigure dovecot and rise the file descriptor limits. Edit dovecot configuration file: nano -w /etc/sysconfig/dovecot Add this at the… Read more »

How to Repair eximstats on cPanel/WHM

Today you will learn how to repair eximstats on cPanel. Sometimes Eximstats, the cPanel daemon in charge of generate stats for email usage, stops working. In order to get your email stats working again, we will have to delete the current MySQL tables and re-create the stats again. How can I repair eximstats on cPanel? At the logs, you may… Read more »

Your access to this mail system has been rejected due to the sending MTA’s poor reputation error

Sometimes when you are sending email to remote hosts you can get this kind of error: Your access to this mail system has been rejected due to the sending MTA’s poor reputation What is the cause of “Rejected due to the sending MTA’s poor reputation” error? It’s a pretty common error when your IP address has been sending SPAM and you… Read more »