Problem
You are unable to send SMTP traffic to certain domains and receive the following error upon examining the Brightmail Gateway Message Audit Logs: "554 Your access to this mail system has been rejected due to the sending MTA's poor reputation"
Error
554 Your access to this mail system has been rejected due to the sending MTA's poor reputation
Cause
Your domain's sending IP address may be on a domain block list (DNSBL), this is due to an account sending out spam.
