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# Options for spamassassin running in exim's local_scan (SA Exim)# By Marc MERLIN <marc_soft@merlins.org> - Initial version: April 2002# Sander Smeenk <ssmeenk@freshdot.net> - Improvements: March 2004## Sample file version 1.16 for SA-Exim 4.1 - 2005/01/10## The parse routine is minimalistic. It expects "option: value" (exactly# one space after the colon, and none before). You should put long lines# on one line. The parser isn't capable of parsing multiline values.## SA threshold values are parsed as floats and other numerical options# are ints. String options have to be set. To unset them, comment out the# variable, don't set it to nothing.## READ THIS:# ---------# Watch your logs, you will get errors and your messages will get# temporarily bounced if expansions fail. Watch your logs!## If you are afraid that spammers might use a header that is used here# as a default, have exim set it to another value than 'Yes' and check# here for that other value.## For every expansion, anything that doesn't expand to "" or "0"# (without quotes) will be considered true. If you set the string to 1,# it will be true without going through exim's condition evaluator (and# if you leave it unset, it will default to 0)## You should not put double quotes around expressions!# --- snip ---# Enable basic verbose output by default. Watch your logs!SAEximDebug: 1# Default path is /usr/bin/spamc, but you can change it hereSAspamcpath: /usr/bin/spamc# Which characters are retained from a Message-Id header (for safety, we# remove characters that might cause problems with shell parsing)# Change the default at your own risk (you also have to change this in# the SA greylisting patch if you use that)#SAsafemesgidchars: !#%( )*+,-.0123456789:<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[]^_abcdefghijklmnopqrstuvwxyz{|}~# If SAspamcSockPath is set spamc uses socket to connect to spamd,# use --socketpath pathname as argument to spamd (new in SA 2.60).# Leave it unset if you want spamc to connect(AF_INET) to spamd at# 127.0.0.1 (this is the default shown in the options below), but if# you set it, it will override the two TCP connect options below#SAspamcSockPath: /var/run/spamd.sock# SAspamcHost / SAspamcPort: TCP socket where your spamd is listening# Shown below are the defaults:SAspamcHost: 127.0.0.1SAspamcPort: 783# Exim configuration string to run before running SA against the message# This decides whether SA gets run against the message or not. This# default will not reject messages if the message had SA headers but# they weren't added by us.SAEximRunCond: ${if and {{def:sender_host_address} {!eq {$sender_host_address}{127.0.0.1}} {!eq {$sender_host_address}{::1}}}}# If you want more detailed control over when to run SA, it's recommended# that you set an ACL variable indicating this from the acl section of# your Exim configuration file. The current maintainer sets acl_m0 to# "noscan" if the sending host is localhost or has authenticated.#SAEximRunCond: ${if !eq{$acl_m0}{noscan}}# (This means exactly the same as ${if !eq{$acl_m0}{noscan} {true}{}},# where the empty string is considered false.)#----------------------------------------------------------------------# Remove or comment out the following line to enable sa-eximSAEximRunCond: 0#----------------------------------------------------------------------# If and only if SAEximRunCond was true, and we did run SA, this# expression decides whether we actually consider acting upon SAdevnull,# SApermreject, and SAtempreject if you have them set.## Use this to tag messages that you shouldn't reject (messages sent to# abuse or postmaster for instance).## As an example, set acl_m0 to "canreject" if a recipient other than# postmaster or abuse is encountered (and the sender isn't local). That# way, spammers can't circumvent blocking by sending to postmaster and# 99 other recipients. (If acl_m0 is taken, you'll of course have to use# a different variable.#SAEximRejCond: ${if eq{$acl_m0}{canreject}}# How much of the body we feed to spamassassin (in bytes)# Default is 250KBSAmaxbody: 256000# Do you want to feed SAmaxbody's worth of the message body if it is too big?# Either, you skip messages that are too big and not scan them, or you can# truncate the body and feed that to SA.# Note that SA will sometimes raise the spam score if it can't parse# the message correctly (since the end is missing, decoding will fail)# Default is 0: do not scan messages that are too big# (note that this is parsed as a condition)SATruncBodyCond: 0# If you want SA to report_safe you need sa-exim to rewrite the body of# the message since SA encapsulates the spam as a mime attachment.# You probably want SATruncBodyCond to be 0 or else you'll end up with a# partial message if it's larger than SAmaxbody and it's spam## Also note that if you enable this option, any saved message will be saved# after the body has been modified by SA.# (this is not a condition as SA's report_safe is not conditional)SARewriteBody: 0# Prepend saved messages with an fake From-header to make the file look like a# valid mbox fileSAPrependArchiveWithFrom: 1# If you are archiving messages that are rejected, how much do you want# to archive? Default is 20MB.SAmaxarchivebody: 20971520# On errors, if you are saving messages, you probably want the entire message# Default size saved (if you are saving errors) is 1GBSAerrmaxarchivebody: 1073741824# You can have SA-Exim add a X-SA-Exim-Rcpt-To header, which will list all# the recipients for the Email, unless the list gets bigger than# SAmaxrcptlistlength bytes.# The default value of 0 disables the header for privacy reasons (the header# exposes Bcced recipients)# Any value bigger than 8000 will be ignored because there is a limit on the# size of headers that you can have and exim's string_sprintf# Note that if you are planning to use greylisting, you should set this# value to 8000 since SA's greylisting code needs the recipients.SAmaxrcptlistlength: 0# Add X-SA-Exim-Rcpt-To and X-SA-Exim-Mail-From headers before SA scans# the message.# If this option is enabled, SARewiteBody is true, and safe_mode is# enabled in SA, you end up with the X-SA-Exim-Rcpt-To/X-SA-Exim-Mail-From in# the attatched message as well without the ability to remove them later in an# exim transport (think privacy).# In real life this is usually not a problem because the message is spam anyway,# and if you turn this off, you lose the option to use those headers to score# the message with SA.SAaddSAEheaderBeforeSA: 1# How many seconds you want to allow spamc to run. Exim 4.04 and better will# kill us after a default of 5 minutes. This however is not great, because the# mail gets temporarily rejected# You should set this and have SA Exim handle the timeout itself and accept the# message if spamc takes too long (instead of timing out)# A value of 0 means no timeout, and we run until exim stops us.# I know of at least one mail server (nanog's merit.edu) that will not# wait a full 5mn (which causes tempreject and resends), so the default is 4mn#SAtimeout: 240# Do you want to save mails that were accepted because spamc timed out?# Specify a directory to enable the feature.# SA-Exim will try to create the directory if it has the permissions to do so,# check your maillog for failures (or create the directory yourself and make it# writeable by exim)SAtimeoutsave: /var/spool/exim/SAtimeoutsave# You can optionally save or not save messages that matched the above ruleSAtimeoutSavCond: 1# You should really create this directory for local_scan to save messages that# created an error. If you don't want this, comment out this variable# Make sure all these directories are owned by the exim user# SA-Exim will try to create the directory if it has the permissions to do# so, check your maillog for failures (or create the directory yourself and# make it writeable by exim)SAerrorsave: /var/spool/exim/SAerrorsave# You can optionally save or not save messages that matched the above rule# You should not put double quotes around the expressionSAerrorSavCond: 1# If you set to 1, SA will temporarily reject messages that generated an error# while they were processed (they'll still be saved if SAerrorsave is set).# Otherwise (0 = false), the messages are just accepted, which seems like a# more sensible defaultSAtemprejectonerror: 0################################################################################ NOTE: Spamd needs to tell sa-exim that the message SA-Exim gave spamd# is spam before sa-exim will consider the SA tresholds.# In other words, you cannot reject mails on SA scores if you set that# threshold to a lower threshold than SA's required_hits value.# The one exception to this rule is SAtempreject (in order to let you# temporarily reject mail when you are doing greylisting, see# README.greylisting in the documentation for details)################################################################################ SA score when you start stalling the sender by sending many continuation# lines for up to SAteergrubetime# This is now a string (without quotes) that gets evaluated at runtime by exim# but you can still assign a simple float value to it# Note that this is an obvious abuse of SMTP, but eh, they started it :-)# Of course, this means that each incoming spam with the right score threshold# will keep an exim process busy on your machine. Make sure you can afford it.# Default value is 2^20, which should disable the behavior# Please, don't teergrube people who relay for you or your own MXes :-)# This option is left behind for backward compatibility, but you can now# get the same result by putting a condition string in SAteergrube# The trick is to list your score if the condition succeeds, and a really# high score otherwise.#SAteergrube: ${if and { {!eq {$sender_host_address}{127.0.0.1}} {!eq {$sender_host_address}{127.0.0.2}} } {25}{1048576}}# SAteergrubecond is deprecated (replaced by SAteergrube)# You used to be say whether you would apply the teergrubing score with this# condition, but now that scores are conditions, it is obsolete#SAteergrubecond: ${if and { {!eq {$sender_host_address}{127.0.0.1}} {!eq {$sender_host_address}{127.0.0.2}} } {1}{0}}# How long do you want to stall the sender (in seconds)# If you set the value too high, you might get too many exim processes running# and run out of process slots# Remember, don't come crying if playing with this "feature" causes your mail# server to catch fire :-)SAteergrubetime: 900# You can optionally save or not save messages that matched the above ruleSAteergrubeSavCond: 1# Do you want to save mails that you stalled for later analysis?# Specify a directory to enable the feature.# SA-Exim will try to create the directory if it has the permissions to do so,# check your maillog for failures (or create the directory yourself and make it# writeable by exim)SAteergrubesave: /var/spool/exim/SAteergrube# When you stall the sender, you will probably get the mail again.# By default, we'll only save messages by message ID so that we don't save# multiple copies every time the sender tries again.# Of course, this means someone could fake someone else's message ID to# overwrite the saved copy of another spam. Such is life :-)SAteergrubeoverwrite: 1# If you reach this score, the mail is accepted and tossed (/dev/nulled).# The default value is 2^20 which should ensure this never happens.# This is now a string (without quotes) that gets evaluated at runtime by exim# but you can still assign a simple float value to it# You should be really sure that the message is spam because the sender will# get no notification#SAdevnull: 20.0# You can optionally save or not save messages that matched the above ruleSAdevnullSavCond: 1# Do you want to save mails that are tossed?# Specify a directory to enable the feature.# This is just in case you do want to keep a copy of the alledge spams somewhere# Messages are saved by unixdate_Message-Id or just unix date if there is no# Message-Id.# SA-Exim will try to create the directory if it has the permissions to do so,# check your maillog for failures (or create the directory yourself and make it# writeable by exim)SAdevnullsave: /var/spool/exim/SAdevnull# SA score when you start rejecting Emails (this is better than the above as# it can notify the sender in case you reject non-spam by mistake)# This is now a string (without quotes) that gets evaluated at runtime by exim# but you can still assign a simple float value to it# Default value is 2^20, which should disable the behavior if you comment out# the line belowSApermreject: 12.0# You can optionally save or not save messages that matched the above ruleSApermrejectSavCond: 1# Do you want to save mails that are rejected?# Specify a directory to enable the feature.# SA-Exim will try to create the directory if it has the permissions to do so,# check your maillog for failures (or create the directory yourself and make it# writeable by exim)SApermrejectsave: /var/spool/exim/SApermreject# SA score when you start returning a temporary reject.# There are few reasons to use this, except if you're reading your tempreject# save folder (see below) and ajusting scores on the fly, or if you are using# greylisting# This is now a string (without quotes) that gets evaluated at runtime by exim# but you can still assign a simple float value to it# Default value is 2^20, which should disable the behavior#SAtempreject: 9.0# You can optionally save or not save messages that matched the above ruleSAtemprejectSavCond: 1# Do you want to save mails that are temporarily rejected?# Specify a directory to enable the feature.# You could use this to analyse what SA is bouncing and adding an allow rule# to accept the mail next time it is sent back to you# SA-Exim will try to create the directory if it has the permissions to do so,# check your maillog for failures (or create the directory yourself and make it# writeable by exim)SAtemprejectsave: /var/spool/exim/SAtempreject# When you send back a temp reject code, you will get the mail again.# By default, we'll only save messages by message ID so that we don't save# multiple copies every time the sender tries again.# Of course, this means someone could fake someone else's message ID to# overwrite the saved copy of another spam. Such is life :-)SAtemprejectoverwrite: 1# See README.greylisting in the documentation for the following options# This is the string that SpamAssassin adds if the message is whitelisted# We use this to optionally increase the score needed for a tempreject# (in order to let a message through when it would otherwise have been# temprejected)# Default value is "GREYLIST_ISWHITE" (as used in the patch provided by SA-Exim)SAgreylistiswhitestr: GREYLIST_ISWHITE# By how much do we temporarly raise tempreject to allow a mail in when it# would otherwise have been temp rejected (because SA flagged it was whitelisted# by the greylisting code provided as a patch to SA in the SA-Exim distro)# Note that greylisting will not work in until you patch SA with the greylist# function# Note that you most likely want# SAtempreject + SAgreylistraisetempreject <= SApermreject# Default value is 3.0 but you'd probably to lower the tempreject score and# increase this one (see README.greylisting)SAgreylistraisetempreject: 3.0# Do you want to save mails that are flagged as spam by SA, but not rejected by# any of the above thresholds? Specify a directory to enable the feature.# That's one way to track mails thare are going through even though they were# flagged by SA (note that you could also save them in exim's system_filter,# although copies saved here happen before exim makes modification to the# message like rewriting)# SA-Exim will try to create the directory if it has the permissions to do so,# check your maillog for failures (or create the directory yourself and make it# writeable by exim)SAspamacceptsave: /var/spool/exim/SAspamaccept# You can control which messages you want saved if you only want a subsetSAspamacceptSavCond: 0# Do you want to save mails that are not flagged as spam by SA# Specify a directory to enable the feature.# This is only here for completeness, if you want to save all messages not# flagged as spam by SA (you could also do this in system_filter)# SA-Exim will try to create the directory if it has the permissions to do so,# check your maillog for failures (or create the directory yourself and make it# writeable by exim)SAnotspamsave: /var/spool/exim/SAnotspam# You can control which messages you want saved if you only want a subsetSAnotspamSavCond: 0# All the following strings can take one '%s' which will be replaced by# spamstatus: "SA score, trigger score"SAmsgteergrubewait: Wait for more outputSAmsgteergruberej: Please try again laterSAmsgpermrej: RejectedSAmsgtemprej: Please try again later# This string is a static string, do not include "%s"SAmsgerror: Temporary local error while processing message, please contact postmaster.