DNS resolution failure on outbound network (Resolved)
Issue / Performance
We are getting reports of rejections on the outbound SMTP. The rejections are due to a DNS failure (reverse DNS lookup / PTR) on one of the ranges we use to proxy deliver email. As of 6:11 AM this issue is resolved and mail is moving without error. If you got the NDR, please resend the message and it willl go through normal delivery process bypassing the affected range.