Yes, the feature was disabled. The system was very limited to begin with, and has been quite broken more recently. A (definitely non-exhaustive) list of issues:
- Only 10 MB of storage per account.
- No IMAP, POP or SMTP. Only RoundCube webmail.
- Forwarders which hardly ever came through (mostly due to inherent problems with email forwarding).
- Emails not getting sent because of bad IP reputation.
- Emails not arriving because of technical issues.
- The mail server being down quite often for quite long periods of time.
- Extremely strict sending restrictions, e.g. only 1 recipient per message.
The mail system is so broken that to call it a feature would reflect badly upon the website hosting itself, which has always been our main focus.