Mail Configuration / Reverse DNS does not match SMTP Banner

[Jon L]

Some of our customers are having problems with email being bounced back with the following error;

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.

The IP isn't blacklisted so it looks like the problem is the reverse DNS on the IP not matching the SMTP banner. This doesn't match and we can't get it to match as they are on a shared IP. But I'm wondering if the real issue is the way we've configured mail.

Our Plesk hostname is plesk.domain.com - should we be using this as the SMTP relay for domains on shared IP?

It also looks like there is an issue with the SMTP banner. This is showing Plesk.home rather than plesk.domain.com (which I assume it should be showing). Is this a configuration problem? Maybe a bug?

We're still running the lite version of Mail Enable at present.

Any advice or pointers would be greatly appreciated as this is causing a major problem at present.

 

[PavelV]

I think you can configure SMTP service in Mailenable Administrator and specify your server's hostname in mail domain name field.