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How to increase the number of simultaneous IMAP connections in Plesk

Plesk-LogoBy default Plesk sets up the IMAP Email Service on your server so that four simultaneous connections can be made from the same IP address in the same timeframe. This is to protect your servers from too many connections.

This however isn’t cutting it if you have a small office full of people on the same IP, connecting from 4 computers, 16 iphones and 12 iPads every 5 minutes.

The solution: tweak the IMAP configuration file, restart the daemon and have a good life. Let me show you how to do it on Plesk 11 and CentOS 6.4.

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