John G. Heim wrote:
I want to make sure that any messages my system sends out always has a
sender of someb...@math.wisc.edu. I am looking at configuring the
smtpd_sender_restrictions directive.
smtpd_sender_restrictions =
hash:/etc/postfix/all_addresses_at_math_wisc_edu,reject
Am I close?
That would work if this is a MSA, ie. used for mail submission
only and doesn't accept mail from the internet. And you
should use check_sender_access hash:... rather than letting
postfix use the default lookup key.
For a general purpose mail server you could preface it with
permit_auth_destination, something like:
smtpd_sender_restrictions =
permit_auth_destination
check_sender_access hash:/etc/postfix/my_domains
reject
As an added bonus you could add reject_unlisted_sender just
before the reject to make sure the sender address exists.
-- Noel Jones
