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Can I use different hostnames in SMTP banner depending on IP address?

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T

Toxalot

Basic Pleskian
Using Plesk 11.5.3 and Postfix 2.8

No matter which IP address I send mail from, the SMTP banner says the server hostname. This results in a warning at MXToolBox which isn't a big deal by itself. But we are trying to get whitelist certified and the HELO server name must match the rDNS of the sending IP address.

I want to send email from our own domain, which has a dedicated IP address, rather than the server domain. I know about PTR records and all domains have proper reverse DNS set up with my hosting provider. Please don't tell me I need to set that up. I want to customize the SMTP banner. It seems it should be possible with Postfix

I found info that smtp_helo_name can be specified in the master.cf file for a specific client, but I can't seem to get that to work. I see lines in master.cf for the different IP addresses. I tried appending
Code: 
-o smtp_helo_name=ourdomain.com
to the line for our IP and reloading Postfix, but it had no effect.
 
I also tried appending

Code: 
-o myhostname=ourdomain.com

to the line for our IP and reloading Postfix. But that did not work either.

Since we have the ability to send from different IP addresses, we should be able to customize the SMTP banner for each one. I've found a few posts about this around the Internet. Some suggest the -o smtp_helo_name and others suggest the -o myhostname and several people seem to have gotten it working, but none are using Plesk.

I found this post where several Plesk users seem to have gotten it working, but they are all using Plesk 10x. Those using 11x can't get it working.
http://forum.parallels.com/showthread.php?258523-SMTP-Banner-Multiple-IP

This is causing us real problems with sending mail through our server.
 
This issue needs to be addressed. It is a problem that will directly effect the Spam reputation of any Plesk Panel 11 host with multiple IP's.
 
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