The mail server, mail.phys.ocean.dal.ca, froze up thisAM and had to be manually rebooted. This has resulted in the mail server being offline, approximately from 10:30 through 11:45am.

I'm in the process of trying to determine the cause of the problem. If required, there may be another reboot of the server to finish diagnosis and confirmation of the problem. Downtime for such a reboot is typically <5minutes, and all main inbound to the server is held in the queue at UCIS, so no mail would be lost; it would only result in temporary disruption to ability to send and receive email for users of this system.