forbes.com refusing mails from torproject.org, DKIM Sender Invalid - envelope rejected
Date: Mon, 6 May 2024 18:24:56 +0000 (UTC)
From: Mail Delivery System <MAILER-DAEMON@submit-01.torproject.org>
To: arma@torproject.org
Subject: Undelivered Mail Returned to Sender
This is the mail system at host submit-01.torproject.org.
I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can
delete your own text from the attached returned message.
The mail system
<xxx@forbes.com>: host us-smtp-inbound-1.mimecast.com[207.211.30.221]
said: 550 DKIM Sender Invalid - envelope rejected -
https://community.mimecast.com/docs/DOC-1369#550
[5U_UYDzrPQykuT7T1C2NTA.us31] (in reply to end of DATA command)
Reporting-MTA: dns; submit-01.torproject.org
X-Postfix-Queue-ID: 9E50C80145
X-Postfix-Sender: rfc822; arma@torproject.org
Arrival-Date: Mon, 6 May 2024 18:24:53 +0000 (UTC)
Final-Recipient: rfc822; xxx@forbes.com
Original-Recipient: rfc822;xxx@forbes.com
Action: failed
Status: 5.0.0
Remote-MTA: dns; us-smtp-inbound-1.mimecast.com
Diagnostic-Code: smtp; 550 DKIM Sender Invalid - envelope rejected -
https://community.mimecast.com/docs/DOC-1369#550
[5U_UYDzrPQykuT7T1C2NTA.us31]
(Recipient email address made private by replacing username with xxx. Happy to provide the actual username on request.)
I worked around it for now by trying to send from my own domain, i.e. leaving torproject.org out of it.
But I wonder if this is their fault or our fault.