helo command rejected: need fully-qualified hostname - help!

[perryh73]

Hi,
Some mailservers send back the above error which I thought Id resolved...

Right, an overview of the setup we have now:
SMTP from ISP > Gateway > Firewall > Exchange 5.5

I added a PTR to the IP(block from NTL) of our gateway to give a reverse lookup on the IP to point to mailhub.domain.co.uk.

The HELO from remote servers gives the internal network name of the gateway server, not the mailhub.domain.co.uk name.

I do a lookup on mailhub.domain.co.uk for a ptr record and it says one does not exist, does this have any bearing on the problem?

How can I set the HELO to reply with mailhub.domain.co.uk rather than the internal name?

Thanks for any help provided.

Perry.

 

[Sanjiv123]

Hey Perry,

Did you resolve this ? We have the same problem.