Jose Borges Ferreira:
[about sending 8-bit envelope into non-UTF8SMTP MTA]
> Is this the expected behaviour ? shouldn't the local part ( jos? ) be
> forbidden ? Is there a way sanitize the address ?
Postfix currently does not announce UTF8SMTP support. Therefore, a
client that sends 8-bit addresses violates SMTP. Just like a client
that sends 8-bit message content without negotiating 8BITMIME.
The behavior for out-of-spec input is undefined. Postfix will
usually try to deliver it as is (and can often be configgured to
reject it). I can promise only that out-of-spec input will not
result in a security exploit in Postfix itself.
To reject 8-bit addresses you'd need a PRCE or REGEXP pattern.
Cleaning up 8-bit addresses belongs in the client; it should not
send 8-bit addresses unless the server announces support for that.