Inbound Email Delays and Pending Upgrades

This morning a portion of our inbound email flows ended up queuing on our MX edge servers due to excessive load on the internal servers that handle email delivery and filtering to local destinations  All queued email was delivered when the issue resolved itself on its own by 9AM.  We are currently tracking down how our monitoring failed to alert us to the problem.  Coincidentally, we’ve been working on several upgrades to our email server clusters.  We’ve recently replaced all of our spam filtering servers and already have hardware on order to replace the cluster that was responsible for the delays this morning.

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