The spamass-milter utility is a sendmail milter that checks and modifies incoming email messages with
SpamAssassin.
The following options are available:
-psocket
Specifies the pathname of a socket to create for communication with sendmail. If it is removed,
sendmail will not be able to access the milter. This may cause messages to bounce, queue, or be
passed through unmiltered, depending on the parameters in sendmail's .cf file.
-bspamaddress
Redirects tagged spam to the specified email address. All envelope recipients are removed, and
inserted into the message as ‘X-Spam-Orig-To:’ headers.
-Bspamaddress
Same as -b, except the original recipients are retained. Only one of -b and -B may be used.
-Crejectcode
Mail that is rejected is rejected by default with a 5.7.1 code. This option allows that to be
overridden. See also, -R -S option.
-ddebugflags
Enables logging. debugflags is a comma-separated list of tokens:
func Entry and exit of internal functions.
misc Other non-verbose logging.
net Lookups of the ignored netblocks list.
poll Low-level I/O to the child spamc process.
rcpt Recipient processing.
spamc High-level I/O to the child spamc process.
str Calls to field lookup and string comparison functions.
uori Calls to the update_or_insert function.
1 (historical) Same as func,misc.
2 (historical) Same as func,misc,poll.
3 (historical) Same as func,misc,poll,str,uori.
-Dhost
Connects to a remote spamd server on host, instead of using one on localhost. This option is
deprecated; use ---dhost instead.
-edefaultdomain
Pass the full user@domain address to spamc. The default is to pass only the username part on the
assumption that all users are local. This flag is useful if you are using an SQL (or other
username) backend with spamassassin and have listed the full address there. If the recipient
name has no domain part (if the recipient is on the local machine for example), defaultdomain is
added. Requires the -u flag.
-f Causes spamass-milter to fork into the background.
-inetworks
Ignores messages if the originating IP is in the network(s) listed. The message will be passed
through without calling SpamAssassin at all. networks is a comma-separated list, where each
element can be either an IP address (nnn.nnn.nnn.nnn), a CIDR network (nnn.nnn.nnn.nnn/nn), or a
network/netmask pair (nnn.nnn.nnn.nnn/nnn.nnn.nnn.nnn). Multiple -i flags will append to the
list. For example, if you list all your internal networks, no outgoing emails will be filtered.
-I Ignores messages if the sender has authenticated via SMTP AUTH.
-m Disables modification of the ‘Subject:’ and ‘Content-Type:’ headers and message body. This is
useful when SpamAssassin is configured with ‘defang_mime 0’ and ‘report_header 1’, or when SA is
simply used to add headers for postprocessing later. Updating the body through the milter
interface can be slow for large messages.
-M Like -m, but also disables creation of any SpamAssassin ‘X-Spam-*’ headers as well. Both tagged
and untagged mail gets passed through unchanged. To be useful, this option should be used with
the -r, -b, or -B flags. If -b is used, the ‘X-Spam-Orig-To:’ headers will still be added.
-Ppidfile
Create the file pidfile, containing the processid of the milter.
-rnn Reject scanned email if it greater than or equal to nn. If -1, reject scanned email if
SpamAssassin tags it as spam (useful if you are also using the -u flag, and users have changed
their required_hits value).
For example, if you usually use procmail to redirect tagged email into a separate folder just in
case of false positives, you can use -r15 and reject flagrant spam outright while still
receiving low-scoring messages.
-Rrejecttext
Mail that is rejected is rejected with the message "Blocked by SpamAssassin". This option allows
the user to call with a different message, instead. See also, the -C option
-S/path/to/sendmail
This option is used in conjunction with the -x option to specify a path to sendmail if the
default compiled in choice is not satisfactory.
-udefaultuser
Pass the username part of the first recipient to spamc with the -u flag. This allows user
preferences files to be used. If the message is addressed to multiple recipients, the username
defaultuser is passed instead.
Note that spamass-milter does not know whether an email is incoming or outgoing, so a message
from ⟨user1@localdomain.com⟩ to ⟨user2@yahoo.com⟩ will make spamass-milter pass -uuser2 to
spamc.
-x Pass the recipient address through sendmail-bv, which will perform virtusertable and alias
expansion. The resulting username is then passed to spamc. Requires the -u flag. The spamass-
milter configuration process does its best to find sendmail, but it is possible to override this
compiled-in setting via the
--spamcflags...
Pass all remaining options to spamc. This allows you to connect to a remote spamd with -d or -p.
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