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To operate in this mode, Postfix system version 2.3.3 or later is required. By default, Dr.Web for UNIX mail servers and Postfix are configured to interact in the after-queue mode. So, new settings that configure operation via Milter protocol, must be specified in the Postfix configuration files instead of the existing ones: change the content_filter parameter to the smtpd_milters parameter and remove all of the changes made to master.cf file. Necessary restrictions can be specified directly in the Postfix configuration files. |
Address of the transport connection through which Postfix interacts with drweb-milter module can be specified as a TCP socket or as a UNIX socket.
Address is specified in the smtpd_milters parameter of the Postfix configuration file main.cf. If the connection is established via a TCP socket, the parameter value is set in the following format: inet:host@port (for example, smtpd_milters=inet:127.0.0.1:3001). If the connection is established through the UNIX socket, the address is set in the following format: unix:pathname, where pathname is an absolute path to the UNIX socket.
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If UNIX socket is used, Postfix must have privileges for writing to the socket file. |
Address of the transport connection between Postfix system and drweb-milter module must be also specified in the Address parameter of the [Milter] section in Dr.Web MailD configuration file. Format and value of this parameter must be identical to the format and value of smtpd_milters parameter in main.cf file.
Apart from transport address, the following parameters must be specified in main.cf configuration file:
•milter_content_timeout = 300s – this timeout of Postfix system is very important. It defines the maximum time period for Dr.Web MailD to check a message in the BeforeQueueFilters mode. It is recommended to set this parameter value greater than the value of the ProcessingTimeout parameter of the [Milter] section in the Dr.Web MailD configuration file;
•milter_default_action = tempfail – this parameter defines action of Postfix if any errors occur during interaction with drweb-milter module;
•milter_protocol = 6 – the required version of Milter protocol;
•milter_mail_macros = _ – this parameter allows Dr.Web MailD to retrieve the IP address and host name of the sender;
•milter_end_of_data_macros = i {auth_type} – this parameter allows to retrieve information on authorization and the message ID to add information on the message to drweb-milter log.
Note features of operation through Milter in the synchronous and asynchronous modes.