To Setup E-Mail Sending you need:
1. Set E-Mail Communication Settings.
Login using you web browser into you printer.
Settings > Network > Email
2. Change SMTP port number (optional, only if your smtp port is different from 25)
Right on you printer in the Menu go
Menu > Network Settings > TCP/IP Settings > Port Number Settings
Select the port you need and type in (using the printer's keyboard) new port number.