At approximately 5:48 EST several of our large customer systems started a systematic DDoS against our outbound network. Because these are trusted systems, they are allowed access to our network without many checks. Unfortunately, these customer systems have been compromised, leading to a DDoS launch of close to 50,000 messages per second.
We have removed offending systems from our grid and mail is flowing normally. Unfortunately, outbound messages relayed during this time period of 5:48 – 6:20 EST (13:48 – 14:20 GMT) were destroyed or mangled. If you have sent messages during this time period, please resend.
We are sorry about the inconvenience and we have acted in as fast of a response as we could to what was a rather massive DDoS against our outbound network.
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