DO NOT REPLY e-mail usability disaster

This email address is not monitored. Click on the link in
the ticket email to add updates to the ticket, do not reply
to the ticket emails.

Sincerely, FastMail Support

This has to be the WORST usability failure for any modern ticketing software. One of the primary goals of a good ticketing system should be making communication fast and easy.

I know handling email replies is hard stuff, but deal with it.  I'd honestly expect more from a company whose whole business is email, email, email.