GWIA: Error 450 Host Down

[jfk8680]

Hi,

One of my clients is using GroupWise 5.5. They cannot send email to what appears to be just one domain. GWIA moves all messages sent to this particular domain to the DEFER folder and gives an error 450 Host Down in the log. I did a lot of research and found that I am not the only one with this 450 error. I tried everything I could find but still don't have a clue what is causing this problem.

I donwloaded GWIP.NLM to test IP connectity to the remote mailserver:
- The MX lookup test was succesfull
- I could connect to port 25 without any problems.

I downloaded a telnet client for Netware (TEL.NLM):
- I copied the contents of a message in the DEFER folder and set up a TELNET session on port 25 and pasted the "script" into the telnet session. The mail was delivered correctly.

Also worth mentioning is that both the Groupwise server and the receiving server are in a corporate WAN. There are NO firewalls between them. The receiving server can receive mail from another domains and Groupwise servers in the same WAN.

Can anybody help me out here??

Thanks

Jeffrey Kusters

MCSA, MCSE, CCNA

 

[bytehd]

dnsstuff was cool
especially the open relay test
which of course every GWIA 5.5 shows up as!


George Walkey
Senior Geek in charge

http://www.insyncva.com