We are unable to send or receive from yahoo.com. We have no problems with any other mail systems and this includes Gmail and Outlook.
The log error is as below
SMTP error from remote mail server after end of data: 554 Message permanently deferred due to unresolvable RFC.5321 from domain
Our SPF, DKIM and DMARC records are all setup as we know what RFC.5321 refers to.
This happens across the range of our DirectAdmin servers even on different networks.
Could this then be an Exim configuration matter or any suggestions please
The log error is as below
SMTP error from remote mail server after end of data: 554 Message permanently deferred due to unresolvable RFC.5321 from domain
Our SPF, DKIM and DMARC records are all setup as we know what RFC.5321 refers to.
This happens across the range of our DirectAdmin servers even on different networks.
Could this then be an Exim configuration matter or any suggestions please