[RFCI-Discuss] about FQDN for our smtp servers

[Yiorgos Adamopoulos]

Alex van den Bogaerdt wrote:
> It is quite simple.  The HELO parameter has to be *the*host*name* of
> the client.  A fully qualified domain name. The canonical name, not
> an MX record. Not a local alias.  Not a CNAME.

And I think the list participants need to read

http://groups.google.gr/group/comp.mail.misc/browse_thread/thread/b2d5af8b081e9e3f/ff40113a821308a9?lnk=st&q=mark+crispin+ncp+smtp+helo&rnum=1&hl=el#ff40113a821308a9

to see (in Mark Crispin's words) why it was decided to have the HELO 
verb the way it is.