After upgrading to GroupWise 8 from 7.03hp1a started hearing about emails not being delivered to some domains.
Found that when I used the aboutmyip NULL SMTP checker the GWIA is receiving a error when passing the EHLO command.
When I telnet (port 25) to any of the mail servers that came back with this error and manually enter in the command they work fine.
So for a temp solution added the /NOESMTP to the gwia.cfg in the system folder.
Before the upgrade we did not see this issue. I did delete the Internet Address from the Internet Address System menu. Wiped out and replaced the two spots in the C1 GWIA tabs. The C1 (1.3.6h) snapins show ver 8.

Could this be a bug in 8?

Thanks much in advance.....

12/21/08 8:59 AM - [ 1] ************** New Connection from: 10.100.1.20 **************
12/21/08 8:59 AM - [ 1] S <-- 220 SMTP server ready 12/21/08 8:59 AM
12/21/08 8:59 AM - [ 1] C --> EHLO CHANGENAME.k12.wi.us
12/21/08 8:59 AM - [ 1] S <-- 500 Syntax error, command unrecognized
12/21/08 8:59 AM - [ 1] C --> HELO CHANGENAME.k12.wi.us
12/21/08 8:59 AM - [ 1] S <-- 250 CHANGENAME.k12.wi.us. Please to meet you
12/21/08 8:59 AM - [ 1] C --> MAIL FROM:<Admin@CHANGENAME.k12.wi.us>
12/21/08 8:59 AM - [ 1] S <-- 250 OK
12/21/08 8:59 AM - [ 1] C --> RCPT TO:<USER@CHANGENAME.com>
12/21/08 8:59 AM - [ 1] S <-- 250 OK
12/21/08 8:59 AM - [ 1] C --> DATA
12/21/08 8:59 AM - [ 1] S <-- 354 Start mail input; end with <CRLF>.<CRLF>
12/21/08 8:59 AM - [ 1] S <-- 250 Message queued for delivery.
12/21/08 8:59 AM - [ 1] C --> QUIT
12/21/08 8:59 AM - [ 1] S <-- 221 Good bye. Hope to see you again
12/21/08 8:59 AM - [ 1] ~~~~~~~~~~~~~~ Connection closed: 10.100.1.20 (140 ms)~~~~~~~~~~~~~~