At 10:55PM on August 20th the SmarterMail service stalled causing the email services on MX01 to stop completely. SMTP, POP3, IMAP, and the webmail interface was offline for approx. 20 minutes. The XMPP service was not affected by the initial stall, however was brought down when the service was recycled.
No incoming emails were lost due to the outage, our 2 backup mail servers were not affected and were able to catch all email directed to them during this period.
MX01 is now online and running without issues, we have created a dump report of the SmarterMail service and will provide it to SmarterTools for further testing and debugging to see the cause of the service stalling.
Our apologies for any inconvenience caused during this period.