Mulltiple mailbox connections fail on Plesk for Windows

Just selecting "allow multiple sessions"  doesn't work, both on Server 2003 / Server 2008.

A registry tweak does do the trick. If you are on a Win system then follow the below steps:

Browse to: HKLM > Software > MailEnable > MailEnable > Services > POP
Then look for "concurrent access enabled" and make sure the setting is set to 1 (allow)


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