2015-03-14 19:53:50 Send_09 <robert.wolfe@winserver.us> - 450 Return
Path not v
erifiable.
2015-03-14 19:53:50 Send_09 450 Return Path not verifiable.
If I had to guess, I would suspect the reject is based an SPF validation failure.
I put SPF records in the DNS records for the affected domains and things seem like they are working now.
--- BBBS/2 v4.10 Dada-1
* Origin: Omicron Theta OS/2 BBS | Memphis, TN | os2bbs.org (1:116/17)