Chapter 25 . Running a (Managed web hosting) Mail Server 685
Chapter 25 . Running a Mail Server 685 about enabling SMTP authentication can be found on your server in /usr/ share/doc/exim4-base/README.SMTP-AUTH and /etc/exim4/conf.d/ auth/30_exim4-config_examples. The Courier authdaemon examples in 30_exim4-config_examples can be enabled, allowing Exim to use that facility for authentication and negating the need to set up a different mechanism. In order for it to work, however, you will need to add the Debian-exim user to the daemon group (gpasswd -a Debian-exim daemon) and restart Exim. . The following error indicates that the ClamAV daemon could not read the temporary message file: 1E9PDq-0003Lo-BY malware acl condition: clamd: ClamAV returned /var/spool/exim4/scan/1E9PDq-0003Lo-BY: Access denied. ERROR Make sure you added clamav to the Debian-exim group and restarted ClamAV, as shown in the installation section. . This error usually indicates that the ClamAV daemon is not running: 1E9PGL-0003MX-38 malware acl condition: clamd: unable to connect to UNIX socket /var/run/clamav/clamd.ctl (No such file or directory) Start it using invoke-rc.d clamav-daemon start. You can also use the clamdscan program to test the daemon, as follows: # clamdscan /usr/share/clamav-testfiles/clam.exe /usr/share/clamav-testfiles/clam.exe: ClamAV-Test-File FOUND ———– SCAN SUMMARY ———– Infected files: 1 Time: 0.001 sec (0 m 0 s) Messages Not Delivered by Exim In some cases, messages will be accepted by the server but will not be deliverable. Some of these errors are considered temporary failures and will not generate a bounced message until the retry timer runs out. The error that you are most likely to see will look something like this in the mainlog file: 1E9PTu-0003jN-QY == user@example.org R=local_user T=maildrop_pipe defer (0): Child process of maildrop_pipe transport returned 75 (could mean temporary error) from command: /usr/bin/maildrop This error indicates that Exim attempted to pass the message to Maildrop, but Maildrop returned an error code. The most likely causes are a missing Maildir directory, or a Maildir directory that is owned by the wrong user. The next section shows how to detect and fix these problems. Note
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