Hello everyone,
I'm reaching out for assistance regarding an email delivery issue we're experiencing. We have a sender whose reputation was checked using MXToolbox, but emails sent to us are still being bounced back. The return message states:
"BounceClassification: Reputation; Reason: 554 MYDOMAIN Your access to this mail system has been rejected due to the sending MTA's poor reputation. If you believe that this failure is in error, please contact the intended recipient via alternate means.; Type: blocked"
We are considering adding the sender's domain to the exception list on our Cisco Gateway C100V. While we've successfully created an address list, we're unable to select the relevant list for the domain exception list.
Has anyone encountered a similar issue or could provide guidance on how to resolve this? Any help would be greatly appreciated!
Thank you
