ntdoc,
It is an issue only for qmail hosted email accounts, but the forums I am working for are international and large. The email address I used to register in your forums is hosted by godaddy, secureserver.net handles email for a large number of sites. Unfortunatley, it appears that qmail is the only email service that is currently enforcing 822bis section 2.3. From my research, it seems that this qmail standard is very old, and hasn't been an issue with IIS 5, but IIS 6 doesn't convert the \n into \r\n.
I hope you don't mind me using your forums to test my theory. If my suspiciouns are correct, you will find my registration email stuck in your SMTP queue (Inetpub/mailroot/Queue, or recieve a failed delivery notification depending on your server setup.
Thanks
