Comcast/Xfinity is binning email sent from Thunderbird to yahoo, gmail or hotmail
This problem started on April 24.
I have compared the Mozilla info at the front of ema… (read more)
Comcast/Xfinity is binning email sent from Thunderbird to yahoo, gmail or hotmail
This problem started on April 24.
I have compared the Mozilla info at the front of emails sent to my wife before and after April 24. The only differences other than Subject and content are:
From - Mon, 22 Apr 2024 16:34:28 GMT
From - Sat, 27 Apr 2024 08:10:47 GMT
Message-ID: <c43e9437-1603-41fe-bc73-699c2ac4ddb0@acm.org>
Message-ID: <ce6cfda0-24b8-4503-9838-2d16fe8fbe94@acm.org>
Date: Mon, 22 Apr 2024 09:34:26 -0700
Date: Sat, 27 Apr 2024 01:10:45 -0700
- The Message-IDs are identified as @acm.org
- My sending address with Thunderbird is @acm.org
- My ISP for Thunderbird is @comcast.net
- If I send from xfinity.com which is comcast, the emails succeed
- If I send from Thunderbird, the emails fail as follows
Emails to yahoo get:
Diagnostic-Code: smtp; 554 5.7.9 Message not accepted for policy reasons.
See https://senders.yahooinc.com/error-codes
Emails to gmail get:
Diagnostic-Code: smtp; 550-5.7.26 Unauthenticated email from acm.org is not
accepted due to domain's
Emails to hotmail get:
Diagnostic-Code: smtp; 550 5.7.509 Access denied, sending domain [ACM.ORG]
does not pass DMARC verification and has a DMARC policy of reject.
[PU4P216MB1581.KORP216.PROD.OUTLOOK.COM 2024-04-28T07:03:54.765Z
08DC66942A10A029] [AS9PR06CA0096.eurprd06.prod.outlook.com 2024-04-
28T07:03:54.886Z 08DC65C282FFA777]
[AMS0EPF000001B7.eurprd05.prod.outlook.com 2024-04-28T07:03:54.887Z
08DC66AF862E5B46]