1. Select the "Manual setup" option.
2. Fill in the required information:
   • Protocol - Select POP most of the time unless you understand IMAP as it may result in additional disk usage.
   • Email address - Your full email address.
   • Username - This will be the same as your email address.
   • Password - The password for your email address.
   • POP/IMAP Server - This will be mail.yourdomain.com, where yourdomain.com is the domain of your email account.
   • Security Type- Most servers only support "None" here. SSL is available if you have a SSL cert on your account only.
   • Server Port - Leave this as default. Port 110 for POP, 143 for IMAP
After your incoming information is validated, enter your outgoing server settings. 
• Login Required - Yes
• Username - Normally as same as inbound or enter full email address
• Password - Same as inbound
• POP/IMAP Server - This will be mail.yourdomain.com, where yourdomain.com is the domain of your email account.
• Security Type- Most servers only support "None" here.
• Authentication - Yes
• Server Port - Port 26

If getting an error as below

"None of the authentication methods supported by this client are supported by your server"

The fix for this is:

Check the option in advanced settings for:

"Log onto incoming mail server before sending mail"

(make sure it is checked)