Yahoo bounce message: 554 5.7.5 (AU01) Message not accepted for policy reasons
If you are not the system administrator for the mail servers affected, we encourage you to contact the administrator, so they can look into the issue further.
This error message indicates that your email wasn't accepted because it failed authentication checks against your sending domain's DomainKeys or DKIM policy. DomainKeys and its successor, DKIM, are email authentication technologies, which ensure emails really come from their claimed domain.
We only reject emails for failing DomainKeys or DKIM authentication when both of these conditions apply:
- The signing domain (i.e., as identified in the "d=" tag of the DomainKeys/DKIM signature) has given us explicit indication that all emails from the domain must be signed and authenticated with DomainKeys and/or DKIM to prevent forgery.
- The rejected email couldn't be authenticated against the sending domain's policy (e.g., due to a missing or bad signature).
We recommend that you contact your domain's mail administrator and make them aware of the problem.
Stop all this jibber jabber, what does it mean?
Yahoo did not send your email to the Yahoo user; the recipient of your email did not received your email. The reason for this is that your email looks like it is send by a sending SMTP server who is not eligible to send email on behalf of you; the DKIM
digital signature could not be validated.
Did I do something wrong?
Perhaps, but probably not.
How can I fix this?
- If you did not send this email, someone may have abused your email address by sending spam on behalf of you. There is nothing you can do, other than be glad that Yahoo has correctly blocked this email.
- If you did send this email, you may be using a third party SMTP server; e.g. a SMTP server that does not manage the domain name in your email address. A fix could be to add SPF / DNS records and make sure your DKIM keys are correctly added in the correct DNS zones. Contact your SMTP server administrator for help.