This is the mail system at host relay.mailchannels.net.
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
<[email protected]>: host mta7.am0.yahoodns.net[67.195.228.106] said: 554
5.7.9 This mail has been blocked because it failed authentication checks
against the sending domains DMARC policy. See
https://senders.yahooinc.com/smtp-error-codes#dmarc-fail for more
information. (in reply to end of DATA command)
Reporting-MTA: dns; relay.mailchannels.net
X-Postfix-Queue-ID: 9077318432D
X-Postfix-Sender: rfc822; [email protected]
Arrival-Date: Mon, 30 Mar 2026 20:00:25 +0000 (UTC)
Final-Recipient: rfc822; [email protected]
Original-Recipient: rfc822;[email protected]
Action: failed
Status: 5.7.9
Remote-MTA: dns; mta7.am0.yahoodns.net
Diagnostic-Code: smtp; 554 5.7.9 This mail has been blocked because it failed
authentication checks against the sending domains DMARC policy. See
https://senders.yahooinc.com/smtp-error-codes#dmarc-fail for more
information.
--- Begin Message ---
This is for testing SMTP mail
--- End Message ---
