Plesk FUCK: Raising Courier-IMAP connections for server on Plesk.

Instructions Plesk comes configured with both a limit of connections per IP address and an overall limit of Courier-IMAP connections. Modern IMAP clients such as Mozilla Thunderbird use mailbox caching to open up multiple connections to increase performance. In the case of Thunderbird, it opens up 5 connections by default which is already 1...

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