NAMEamavisd-milter - sendmail milter for amavisd-new
SYNOPSISamavisd-milter [-fhv] [-d debug-level] [-D delivery-care-of] [-m max-conns] [-M max-wait] [-p pidfile] [-P] [-q backlog] [-s socket] [-t timeout] [-S socket] [-T timeout] [-w directory]
DESCRIPTIONThe amavisd-milter is a sendmail milter (mail filter) for amavisd-new 2.4.3 and above and sendmail 8.13 and above (limited support for 8.12 is provided). Instead of older amavis-milter helper program, full amavisd-new functionality is available, including adding spam and virus information header fields, modifying Subject, adding address extensions and removing certain recipients from delivery while delivering the same message to the rest. For more information you can visit amavisd-milter website: //amavisd-milter.sourceforge.net/ and SourceForge project: //sourceforge.net/projects/amavisd-milter Options The options are as follows: -d debug-level Set the debug level to debug-level. Debugging traces become more verbose as the debug level increases. Maximum is 9. -D delivery-care-of Set AM.PDP request attribute delivery_care_of to client (default) or server. When client method is used then amavisd-milter is responsible to forward the message to recipients. This method doesn't allow personalized header or body modification. When server method is used then amavisd-new is responsible to forward the message to recipients and can provide personalized header and body modification. $forward_method in amavisd.conf must point to some place willing to accept mail without further checking in amavisd-new. -f Run amavisd-milter in the foreground (i.e. do not daemonize). Print debug messages to the terminal. -h Print help page and exit. -m max-conns Maximum concurrent amavisd connections (default 0 - unlimited number of connections). It must agree with the $max_servers entry in amavisd.conf. -M max-wait Maximum wait for connection to amavisd in seconds (default 300 = 5 minutes). It must be less then sending MTA timeout for a response to the final "." that terminates a message on sending MTA. sendmail has default value 1 hour, postfix 10 minutes and qmail 20 minutes. We suggest to use less than 10 minutes. -p pidfile Use this pid file (default /var/run/amavis/amavisd-milter.pid). -P When amavisd-new fails mail will be passed through unchecked. -q backlog Sets the incoming socket backlog used by listen(2). If it is not set or set to zero, the operating system default is used. -s socket Communication socket between sendmail and amavisd-milter (default /var/lib/amavis/amavisd-milter.sock). The protocol spoken over this socket is MILTER (Mail FILTER). It must agree with the INPUT_MAIL_FILTER entry in sendmail.mc The socket should be in "proto:address" format: +
FILES/var/run/amavis/amavisd-milter.pid The default process-id file. /var/lib/amavis/amavisd-milter.sock The default sendmail communication socket. /var/lib/amavis/amavisd.sock Th default amavisd-new communication socket. /var/lib/amavis/tmp The default working directory.
POLICY BANKWhen remote client is authenticated, amavisd-milter forward this information to amavisd-new through AM.PDP request attribute policy_bank: SMTP_AUTH Indicate that the remote client is authenticated. SMTP_AUTH_<MECH> Remote client authentication mechanism. SMTP_AUTH_<MECH>_<BITS> The number of bits used for the key of the symmetric cipher when authentication mechanism use it.
EXAMPLESConfiguring amavisd-new In amavisd.conf file change protocol and socket settings to: $protocol = "AM.PDP"; # Use AM.PDP protocol $unix_socketname = "$MYHOME/amavisd.sock"; # Listen on Unix socket ### $inet_socket_port = 10024; # Don't listen on TCP port Then (re)start amavisd daemon. Configuring sendmail To the sendmail.mc file add the following entries: define('confMILTER_MACROS_ENVFROM', confMILTER_MACROS_ENVFROM', r, b') INPUT_MAIL_FILTER('amavisd-milter', 'S=local:/var/lib/amavis/amavisd-milter.sock, F=T, T=S:10m;R:10m;E:10m') Then rebuild your sendmail.cf file, install it (usually to /etc/mail/sendmail.cf) and (re)start sendmail daemon. Running amavisd-milter This example assume that amavisd-new is running as user amavis. It must agree with the entry $daemon_user in amavisd.conf. First create working directory: mkdir /var/lib/amavis/tmp chmod 750 /var/lib/amavis/tmp chown amavis /var/lib/amavis/tmp Then start amavisd-milter as non-priviledged user amavis: su - amavis -c "amavisd-milter -w /var/lib/amavis/tmp" Limiting maximum concurrent connections to amavisd To limit concurrent connections to 4 and fail after 10 minutes (10*60 secs) of waiting run amavisd-milter with this options: su - amavis -c "amavisd-milter -w /var/lib/amavis/tmp -m 4 -M 600" Troubleshooting For troubleshooting run amavisd-milter on the foreground and set debug level to appropriate level: su - amavis -c "amavisd-milter -w /var/lib/amavis/tmp -f -d level" where debug levels are: 1 Not errors but unexpected states (connection abort etc). 2 Main states in message processing. 3 All amavisd-milter debug messages. 4-9 Milter communication debugging (smfi_setdbg 1-6).
SEE ALSO//amavisd-milter.sourceforge.net //www.ijs.si/software/amavisd/ //www.milter.org/developers //www.sendmail.org
AUTHORSThis manual page was written by Petr Rehor <email@example.com> and is based on Jerzy Sakol <firstname.lastname@example.org> initial work.
BUGSA community mailing lists are available at: //sourceforge.net/mail/?group_id=138169 Enhancements, requests and problem reports are welcome. If you run into problems first check the users mailing list archive before asking questions on the list. It's highly likely somebody has already come across the same problem and it's been solved. AMAVISD-MILTER(8)