How to configure your IMAP email on client application.
Both incoming and outgoing servers must be set to use an encrypted connection.
Name: Your Full Name
User ID or Account: Your RCSID
Incoming mail server: mail.rpi.edu
IMAP: port 143 with STARTTLS (preferred) or port 993 with SSL/TLS
Outgoing mail server: mail.rpi.edu
SMTP: port 587 with STARTTLS (preferred), or port 465 with SSL/TLS
Outgoing server requires authentication: use port 587 with STARTTLS for encryption (sometimes called TLS or SSL for historic reasons, or "encryption"). This is preferred, but if that does not work use port 465, which is an SSL/TLS encrypted connection.
NOTE: At times the above settings do not stick and you will need to go back in and check and possibly redo the port settings for the incoming and outgoing servers and resave.