I don't think you get it. I'm concerned that, if they don't
authenticate with postfix - the purpose of popb4smtp, their sender
authenticated header will not be in the message header for postfix to
reject a bogus sender address. If it did, I wouldn't be asking the
question.
As said, the only way I can think of having postfix to validate the
sender address is by a global general check allowing anyone to use any
email address, as outgoing, that is hosted with postfix. Meaning, if you
are [email protected], you would be able to send mail with the
sender address [email protected] as long as it exists as an email
address or alias on our systems but at least you wouldn't be able to do
a bogus sender address of [email protected]; it
wouldn't be hard to trace who sent spam
I'm asking for an alternative way than this, if sender authenticated
header doesn't work.
Thank you
Jerrale G
S C
