Setting the Port Used by SMTP
Under certain circumstances, you may need to change the port that SMTP listens on. IMail Server uses a Windows NT registry setting to control the SMTP port. To do so:
- Locate the following key
HKEY_LOCAL_MACHINE/System/CurrentControlSet/Services/SMTPD32/Parameters
- Under this key, locate the registry string variable named Port; if none exists, create one.
- Set the value to the desired port number. (Note that the default hexadecimal value for port 25 is 0x19.)
- Stop and restart the SMTP server.
