Assume reject_unverified_sender is set and an email is sent From:u...@mydomain.com. When the email is sent directly from mail.mydomain.com there is no probe, right? But when the message is sent from another server that uses mydomain.com as relay then the probe is done, in which case Postfix probes itself.
чт, 11 февр. 2021 г. в 22:58, Wietse Venema <wie...@porcupine.org>: > Eugene Podshivalov: > > Let me put it this way: does Postfix do probe for outgoing mail? > > reject_unverified_recipient and reject_unverified_sender make no > such distinction. That is a feature, not a bug. > > reject_unverified_recipient has been used on internet gateways that > have no complete table of all valid internal recipients. Those > gateways rely on reject_unverified_recipient to probe an internal > system (such as Exchange) and to populate the valid address cache > dynamically. > > Wietse >
