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I want to block some users to sending out mails to other domains in Exim4. I tried the following configuration but did not work.

Changes done in exim.conf file:

In the main configuration section, enabled the acl_smtp_mail control as follows:

acl_smtp_mail = acl_check_mail

Then, in the acl_check_rcpt ACL configuration section, created a new rule:

accept   condition = ${lookup{$sender_address}lsearch{/etc/exim/freezelist_sender_addresses}{1}{0}}
         control   = freeze/no_tell

I tried this but not worked. Please advice me with configuration.

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2 Answers 2

You can use the following acl

acl_smtp_rcpt = acl_check_rcpt


     message = The $sender_address is prohibited to send mail to the $domain
     senders = lsearch;/etc/exim/restricted_sender
     domains = lsearch;/etc/exim/restricted_domains




# swaks -s --to --from
=== Trying
=== Connected to
<-  220, []
 -> EHLO
<- Hello []
<-  250-SIZE 52428800
<-  250-STARTTLS
<-  250 HELP
 -> MAIL FROM:<>
<-  250 OK
 -> RCPT TO:<>
<** 550 The is prohobited to sent mail to the
 -> QUIT
<-  221 closing connection
=== Connection closed with remote host.
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I wish I could add another +1 for demonstrating using swaks, the best ever tool created for testing smtp connections, configuration, and seeing smtp conversation. Great comment! – Todd Lyons Feb 21 '14 at 15:07

The final Solution step by step

  1. Create file restricted_sender. Example: /etc/restricted_sender
  2. Edit exim.conf
  3. Add the next rule at the beginning of acl_smtp_rcpt: (or how you have called it)

    deny condition = ${lookup{$sender_address}nwildlsearch{/path/to/the/restricted_sender}   {yes}}
      domains = !+local_domains

File /path/to/the/restricted_sender contain emails one per line:
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