03-12-2010
How do I configure sendmail to block all OUTGOING mail FROM one userid TO the world?
Hello,
ENVIRONMENT:
OS: Solaris 10
Sendmail: 8.13.8+Sun
BACKGROUND:
We had a user account that was compromised and was used as a relay. She sent out (or would have if we didn't kill sendmail) ~10K emails alerting people they just won $75K.
The target for this spam was everyone internal to our company and EVERYONE with an @aol.com address, maybe other domains as well, we just stopped looking. Stopping all mail for our company until we took her offline was not a suitable solution.
QUESTION:
Is it possible to configure sendmail as to block ALL OUTGOING email from ONE user? I don't want to shut down mail for the entire organization again. I've seen solutions on how to block INCOMING and how to block outgoing TO targets, but not how to block ALL OUTGOING FROM the sender.
Any help would be greatly appreciated.
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LEARN ABOUT OSF1
mailstats
mailstats(8) System Manager's Manual mailstats(8)
NAME
mailstats - Displays statistics about mail traffic
SYNOPSIS
mailstats [-o] [-C cffile [-f stfile]
FLAGS
Do not display the name of the mailer in the output. Use cffile as the name of the sendmail "cf" file instead of /var/adm/sendmail/send-
mail.cf. Use stfile as the input statistics file instead of /var/adm/sendmail/sendmail.st.
DESCRIPTION
The mailstats command reads the information in the /var/adm/sendmail/sendmail.st file (or in the file specified with the -f flag), formats
it, and writes it to standard output. Note also that you can change the location of the sendmail.st file by editing its pathname in the
sendmail.cf file.
EXAMPLES
The format of the information is shown in the following example, in which the first field (M) contains a number that indicates the position
of that mailer in the sendmail.cf file, starting at 0 (zero). For example, the first mailer in the sendmail.cf file corresponds to the
number 0 in the mailstats display, the second mailer corresponds to the number 1, and so on. Statistics from Thu Feb 17 11:20:01 2000 M
msgsfr bytes_from msgsto bytes_to msgsrej msgsdis Mailer 1 50 77K 1 3K 0 0 local 6
43 59K 58 99K 0 0 smtp ============================================================ T 93
136K 59 102K 0 0 The fields in the report have the following meanings: Indicates the position of the mailer in
the sendmail.cf file. Indicates the number of messages received by the local machine from the indicated mailer. Indicates the number of
bytes in the messages received by the local machine from the indicated mailer. Indicates the number of messages sent from the local
machine using the indicated mailer. Indicates the number of bytes in the messages sent from the local machine using the indicated mailer.
Indicates the number of rejected messages. Indicates the number of discarded messages. Indicates the name of the mailer.
If sendmail transmits mail directly to a file, such as the dead.letter file or an alias target, the message and byte counts are credited to
the prog mailer, as defined in the sendmail.cf file. However, mailstats will still default to var/adm/sendmail/sendmail.st.
FILES
Specifies the command path Contains system statistics Contains configuration information for sendmail
RELATED INFORMATION
Commands: sendmail(8) delim off
mailstats(8)