Thanks for your vote of confidence, but I still have no idea what you
mean by SMTP-auth. If the client auth's on an SMTP connection it's
submission, not SMTP.
Wikipedia doesn't seem to have a problem.
https://en.wikipedia.org/wiki/SMTP_Authentication
It also confirms that it's used for submission, not SMTP, so I remain
baffled about what if any point you are trying to make.
Regards,
John Levine, johnl@xxxxxxxxx, Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly