cc:Mail Link to SMTP Undeliverable Message: Unknown user: Angela Liang

[administrator@xxxxxxxxxxxxxxxxxxxx]

On Thu, Jul 29, 1999, Alexey Melnikov wrote:

> "No realm = Empty string realm" has reasonable meaning only if server 
> supports empty string realm.

IMHO "No realm" != "Empty realm" (see below).

> This is reasonable example from my point of view and I don't want to 
> force every server to list all realms.

Good, because it could be a real big list for MTAs etc
supporting a large set of virtual domains.

> I don't agree. Client MUST send realm to a server [until we all agree 
> that no realm means that it is empty string], because realm is used to 
> calculate hash!!! Client MAY request it from user or MAY obtain it from 
> another source.

IMHO the server could fall back to a default realm (e.g. it's FQDN)
if no realm is sent by the client.