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.









