Issue "I am experiencing the '-ERR Temporarily refused connection because the server is too busy' issue."

[okanc]

Server operating system version

Windows 2016

Plesk version and microupdate number

Obsidian 18.0.56

Hello,

I'm using Windows 2016 with Plesk Obsidian 18.0.56 version. Lately, I've been experiencing serious issues with email. I intermittently get the "ERR Temporarily refused connection because the server is too busy" error, and I can't access my emails. All services and settings seem to be correct. What could be the issue? Do you have any ideas?

Thanks,

 

[Peter Debik]

You can try to increase the value of Maximum concurrent connections for POP under MailEnable Admin > Servers > Localhost > POP > Properties > General tab (check details here: http://www.mailenable.net/documentation/10.0/Standard/POP_General.html).