The setup differs between mail programs, but some things are fixed, while there are some settings which are only decorative. in particular the following settings can be made in the account configuration on most mailers.

Mailbox type: Choose IMAP OA5 supports both IMAP and POP3 but we recommend IMAP

Mailbox server This will be IMAP.MYDOMAIN irrespective of what was chosen above

SMTP Server SMTP.MYDOMAIN

SMTP Port 587 (Email submiussion --- this requires authentication)

Email address ME@MYDOMAIN tell OA5 what to set up.

Account Name ME@MYDOMAIN this is the same as your full email address

Password Also notified from OA5 initially

Authenticate SMTP yes but not with Microsoft authentication

USE SSL is optional OA5 uses a certificate it created itself, as this is only to provide privacy,