Hello,
Abstract problem:
allow a external third party to relay messages with
one fixed envelope sender. Certificates must be used to allow relay
permissions.
Do I really need additional UserID+Passwords to limit to a specific
envelope sender
or could information from the ccert be used?
My view so far:
Using SASL authentication a SMTP client can be authorized to relay a message
and / or use a specific envelope sender in the MAIL FROM command.
Using TLS certificates a SMTP client can be also authorized to relay
a message.
The information ccert_subject and envelope sender is accessible
for SMTP access policy delegation servers and for milters too. But I
have to write a little
small daemon what I like to avoid...
Are there other options too?
Andreas
