Linux Server Hacks – How to increase Plesk Q-mail Maximum E-mail Attachment size of 2MB!

Well, recently I had one of my clients that I host their e-mail system on my web server ask me if they can send more than 2MB for their e-mail attachments.

To do this on a Plesk system, you need to create a new file for the Q-mail.

Plesk defaults to 2MB for e-mail attachments.

Goto this directory:


make a file called “databytes” and store the max number of bytes allowed.

For example, “4000000″ would be max 4MB attachments.

via zwiki

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