How to change SMTP port in Plesk Windows

Open REGEDIT

Go to…

For 64bit machines [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Mail Enable\Mail Enable\Connectors\SMTP]

For 32bit machines [HKEY_LOCAL_MACHINE\SOFTWARE\Mail Enable\Mail Enable\Connectors\SMTP]

Find “Listen Port” Change the value “DECIMAL”

And change it to new port, and Reboot the Plesk SMTP Connector Service…

NOTE : If firewall is enabled then make sure new SMTP port is opened.

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