On Wed, Jan 16, 2019 at 07:14:37AM -0500, Wietse Venema wrote: > insiders_only = check_sender_access hash:/etc/postfix/insiders, reject
On above line if I replace reject with reject_unauth_destination it becomes permissive rather than rejecting. What is the exact difference between reject and reject_unauth_destination? I thought it's about rejecting with proper code. But looks like it has different semantics. The problem with `reject' is the sender's server returns the mail calling us as `improperly configured'. (Hope that doesn't lead to blacklisting!) I think it's better to reject with proper error code. Mayuresh
