Here are the key settings that are required for mail applications on all computers and smartphone.
Example Email Address: firstname.lastname@example.org
Example Username: postmaster%pmbx.net (notice that the % character supplants the @ character in email addresses)
WARNING: Usernames and Passwords are ABSOLUTELY requred for BOTH SENDING AND RECEIVING settings!
Mail Server Host (for both sending and receiving): mail.pmbx.net
Secure receiving email ports: 995 (for POP), 993 (for IMAP)
Secure sending email ports (in the order I suggest your try them): 994 (also 587, or 465 may work)
Encryption setting (where available to be specified): SSL (not TLS or Auto in Windows)
Outlook is a Windows email application which comes in different versions. Because things change in newer versions,you may need to refer to Microsoft’s setup page for all versions of Outlook: