Try telling your laptop to use SSL on port 993 instead of TLS on port 143 (for imap) and SSL on port 465 instead of TLS on port 25 (for smtp).
For imaps auth problems, start with /var/log/imaps/current
For smtps auth problems, start with /var/log/qpsmtpd/current &/or /var/log/sqpsmtpd/current
Does webmail work on your system? Do the same username and password work in webmail?
Do you need to install a certificate on the laptop?