Quick Setup

IMAP: mail.hcoop.net:993 (SSL) or mail.hcoop.net:143 (STARTTLS) - use the hcoop username only, or a virtual email address

SMTP: mail.hcoop.net:465 (TLS)

POP3: mail.hcoop.net:995. If you're using Thunderbird, make sure to uncheck "Use secure authentication". Do not use port 110; it is not available.