Operation principle of Qmail is based on replacement (proxying) of the mail system. Via the interface set for qmail-queue module (the main executable file of Qmail system), the filter receives a message, checks it and if the message is not infected, the filter moves it to qmail-queue.
Operation in this mode has the following limitation: UNIX sockets, which drweb-qmail listens for scan requests (are set in the ListenUNIXSockets parameter in the [Qmail] section of the Dr.Web MailD configuration file) must be located in certain directories. To display a list of paths, run the qmail-queue with --help command line parameter).
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For integration with Dr.Web MailD Qmail version not earlier than 1.03 is required. To avoid possible loss of incoming mail, filter must be installed only when Qmail is stopped. |
Integration of Dr.Web MailD with Qmail can be performed both manually (refer to the instructions below) and with the use of the configure_mta.sh configuration script (that resides in the directory %bin_dir/maild/scripts/). It can configure interaction, as mentioned in the instructions below, but cannot add users to the corresponding groups. Thus, if you used the script for integration configuration, do not forget to add users to the groups (see below).