Mail Server Outage – Resolved

At some point over the evening last night, the mail server started returning “421 Too Busy” or similar errors to most/all requests. This issue has now been resolved, please accept our apologies.

We do have any automated tool that detects and correct this particular situation, but this time the process refused to terminate upon request, and it took human involvement to resolve, explaining the several-hour length of this outage.

Since most SMTP servers retry for 24-72 hours (and since our server was returning a correct “retry later” error), we do not expect any mail to be lost, and based on the current traffic graphs, mail is currently flowing at a very high rate as the mail flow catches up.