Hi When a user at my work tries to send a email to a certain business domain he gets this bounce back:
SMTP error from remote mail server after initial connection:
host mx2.hain-celestial.iphmx.com [18.104.22.168]:
554 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.
Can someone advise how to solve this issue? Do we need to contact the business we are trying to email?