Office 365 POP3 and IMAP settings?
To connect using POP you will need to log in with your primary email address and password. The outgoing, or SMTP server, should be set to use the same credentials as your incoming server.
Email servers have port numbers for email programs to connect to. The port numbers are standardized, and email programs are defined with these numbers for encrypted and unencrypted connections. SMTP should be configured for TLS security, not SSL.