On 23 Nov 2019, at 10:13, Gianni Angelozzi <gia...@sistema3.it> wrote: > Yes, I need smtp_sender_dependent_authentication because the upstream ISP > will only accept incoming mails from the authenticated user.
That doesn’t imply a need for smtp_sender_dependent_authentication. That is needed, AIUI, when you have multiple senders on your system who all need separate authentication. > Enable sender-dependent authentication in the Postfix SMTP client; this is > available only with SASL authentication, and disables SMTP connection caching > to ensure that **mail from different senders** will use the appropriate > credentials. (Emphasis mine) -- 'Does he have people put to death?' said Mort. SOMETIMES. THERE ARE SOME THINGS YOU HAVE TO DO, WHEN YOU'RE A KING.
