Mimecast Delays
Incident Report for SMTP2GO
Resolved
We have put measures in place to work around Mimecast's issue.
Posted Sep 03, 2020 - 21:27 UTC
Monitoring
A fix has been implemented and we are monitoring the results.
Posted Sep 03, 2020 - 21:00 UTC
Investigating
We are seeing some delays with emails sent to Mimecast users. It appears Mimecast is sometimes incorrectly producing the error "451 Open relay not allowed".

https://community.mimecast.com/docs/DOC-1369#451

We are investigating the issue urgently. However, we would also recommend that recipients contact Mimecast to report the issue as well.

Thank you.
Posted Sep 03, 2020 - 16:50 UTC
This incident affected: Email sending (SMTP service).
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