Can't Send Email?
If you can receive email but you can't send email after following the instructions above, you will need to change your
outgoing mail (SMTP) port from the default of 25 to 1025.
To do this:
Click on 'Tools' then 'E-mail Accounts...' then 'View or change Existing e-mail accounts'. Click the 'Next'
button, highlight the account you wish to change and click the 'Change'
button. Then click 'More Settings...' followed by the 'Advanced' tab.
Now, under Server Port Numbers change 'Outgoing server (SMTP)' from 25 to 1025.