I start up s-nail on a mailbox and send myself a test message. Fine.
It arrives. Then, without doing anything in between, I try to send
exactly the same test message again and I get
s-nail: SMTP server: 535 5.7.0 authentication failed
I have the settings
mta=myname@smtp.theirdomain:587
smtp-auth=gssapi
from=myname@theirdomain
and I have a kerberos ticket.
The smtp server is some sort of linux machine, no involvement of
Microsoft or Gmail.
Evidently something changes between the first test message and the
second, but I don't know what it could be.
Sending through the same smtp server with the alpine mail program, there
is no such problem.
Stephen Isard
