Configure PORT Incoming and Outgoing Server [SMTP] in Mail for Macbook using POP

Setting PORT Outgoing server

Run application MAIL
Click Mail >> Preferences

Tab bar Account >> Select account >> Server Settings

Click drop-drown select Edit SMTP Server List…

Setting Port: 25 or 8825 or 587 or 465 [Default 587]
Click select enable Use TLS/SSL
Drop-down Authentication Select Password
Click OK

Setting PORT Incoming server

Unselect automatically manage connection setting
Setting Port: 143 or 993
Click select enable Use TLS/SSL
Drop-down Authentication Select Password
Click Apply and OK

Finish.