Also, do keep in mind that when making any changes you will need to press "OK" to apply any changes made before testing, otherwise you will be testing the previous applied configuration.
AOL:
Port: 587
SSL: Enabled
User: "YourUserName" or "YourUserName@aol" Note: New accounts require "@aol.com" in username.
Password" "Your App Password" Note: This is different than your AOL Password and needs to be configured within AOL's Account Security settings
Comcast:
Port: 587
SSL: Enabled
User: "YourUserName" (Note that the user name field should NOT contain "@comcast.net".)
Password" "YourPassword"
Gmail:
You may need to sign in using app passwords by Google, for information please visit - https://support.google.com/accounts/answer/185833?hl=en
Port: 587
SSL: Enabled
User: "YourUserName" (Note that the user name field should NOT contain "@gmail.com".)
Password" "YourPassword"
Hotmail:
Yahoo:
See 'Yahoo Config' screenshot below
Please note you must enable 'POP' within your email account - Enable POP in Yahoo
You may need to sign in using app passwords by Yahoo, for information please visit - https://help.yahoo.com/kb/SLN15241.html
Note: Yahoo may require a paid account for utilization of the SMTP/POP services.
Port: 587
SSL: Enabled
User: "YourUserName" (Note that the user name field should NOT contain "@yahoo.com".)
Password "YourPassword"