if you want to be able to send using multiple different email addresses or via multiple different SMTP servers then you can add additional SMTP accounts.
Sometimes if you are travelling and not using your normal Internet connection you may need to send using a different SMTP server.
Alternatively you can usually send using SSL or on port 587 no matter which Internet connection you are on.
Email Address
The email address for this account
john@example.co.uk
Displayed Name
The name displayed when sending from this account
John Smith
Server
Each account can be sent using a separate server.
Be sure to fill in the correct server details for each account. SMTP is usually on port 25 but use port 465 for SSL encrypted SMTP or port 587 to use STARTTLS
pop3.yahoo.co.uk, port 110
Username
Check with your email account service provider what to use as the username. Sometimes it is the entire email address.