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abr_stackoverflow
Asked: 2016-08-03 10:27:40 +0800 CST

How to accept message only from authenticated user

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I want exim to accept messages only from that user which authorized via SMTP. Now I have these lines in the config:

  accept
    authenticated = *
    sender_domains = +local_domains
    control = submission/sender_retain
    control = dkim_disable_verify

  deny
    message = Unauthorized
    sender_domains = +local_domains
    !authenticated = *

It makes that any authorized user can send messages from local domains. For example, I have two domains: local1.com and local2.com and users user1 and user2 (suggest that both of domains have these users). If I authenticate as [email protected] I can MAIL FROM: [email protected] and even [email protected]. But I want to deny any different users even if they are local. Only [email protected] must be accepted.

authentication exim

1 Answers

  1. During authentication user's credentials are stored in the $auth1, $auth2 and $auth3 variables. More specifically, $auth1 contains user's login in form [email protected]. So you have just verify whether that login is equal to the $sender_address:

    accept
  authenticated = *
  condition     = ${if eq{$auth1}{$sender_address}}

deny
  authenticated = *
    • 0