Undeliverable emails to yahoo account

BobHedgeEnd — Fri, 07 Mar 2025 12:18:38 GMT

A recent problem I am having is trying to send emails to a certain yahoo account (ending .co.uk) This account is one of several in an organisation's domain. The message I'm getting from The Mail-Daemon service is as follows (recipients email address I've concealed):

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

XXXXXXXXXXXXXX@yahoo.co.uk>: host mx-eu.mail.am0.yahoodns.net[188.125.72.73]

said: 554 5.7.9 Message not accepted for policy reasons. See

https://senders.yahooinc.com/error-codes (in reply to end of DATA command)

Reporting-MTA: dns; relay.mailchannels.net

X-Postfix-Queue-ID: 3C6FA2C92AC

X-Postfix-Sender: rfc822; rjdeverill@talktalk.net

Arrival-Date: Wed, 26 Feb 2025 22:42:52 +0000 (UTC)

Final-Recipient: rfc822; XXXXXXXXXXXXXX@yahoo.co.uk

Original-Recipient: rfc822; XXXXXXXXXXXXXX@yahoo.co.uk

Action: failed

Status: 5.7.9

Remote-MTA: dns; mx-eu.mail.am0.yahoodns.net

Diagnostic-Code: smtp; 554 5.7.9 Message not accepted for policy reasons. See

https://senders.yahooinc.com/error-codes

By chance I discovered that another person, also a TalkTalk user, has emailed the same recipient and had that email returned. This is an ongoing problem for me but I'm a bit out of my depth to know how to go about solving it. I use Thunderbird as client and have all the correct security settings. Can you help please.

Re: Undeliverable emails to yahoo account

Ady-TalkTalk — Tue, 11 Mar 2025 09:15:39 GMT

Hi BobHedgeEnd, have you tried sending the mail directly from TalkTalk webmail to the yahoo address. TalkTalk no longer permit/support mail forwarding and that means that mail sent through forwarding will not comply with DMARK requirements.

Ady

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Undeliverable emails to yahoo account

Re: Undeliverable emails to yahoo account