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Exchange Server sending to @comcast.net, 550 5.1.0

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Exchange Server sending to @comcast.net, 550 5.1.0

Could you please investigate an issue where email messages coming from my Exchange server being sent to @comcast.net email addresses are being rejected?  One message received was "550 5.1.0 Connection is not being accepted at this time. (in reply to MAIL FROM command)".

 

Exchange server information, mail.cpind.com with public (Comcast) IP 75.145.148.137

Official Employee

Re: Exchange Server sending to @comcast.net, 550 5.1.0

I'm not seeing anytihng corresponding to this.  Could you try again and give me a rough estimate on date/time so I can check logs?


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New Poster

Re: Exchange Server sending to @comcast.net, 550 5.1.0

The original issue was logged this morning 6/25/2019 at 8:36am, I assume that is Eastern.

I did have the sender try again and it seems to have worked, so perhaps it was a transient issue.

Thank you for looking into the issue, I appreciate the quick response!