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Operating Systems Solaris How do I configure sendmail to block all OUTGOING mail FROM one userid TO the world? Post 302403801 by jim mcnamara on Sunday 14th of March 2010 08:44:12 PM
Old 03-14-2010
You did block/stop/delete whatever caused the one account to become a spambot, right? Othwerise the problem will spread to other user accounts. And this answer becomnes pointless.

You can employ setfacl to block execute access for the sendmail image for use by one specific username. I would completely disable that account, and move it to the nobody group if you have one. I would also question any file that user had write acces to. Then give the user another, new account.
 

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check-permissions(1M)					  System Administration Commands				     check-permissions(1M)

NAME
check-permissions - check permissions on mail rerouting files SYNOPSIS
/usr/sbin/check-permissions [login] DESCRIPTION
The check-permissions script is intended as a migration aid for sendmail(1M). It checks the /etc/mail/sendmail.cf file for all configured alias files, and checks the alias files for :include: files. It also checks for certain .forward files. For each file that check-permis- sions checks, it verifies that none of the parent directories are group- or world-writable. If any directories are overly permissive, it is reported. Otherwise it reports that no unsafe directories were found. As to which .forward files are checked, it depends on the arguments included on the command line. If no argument is given, the current user's home directory is checked for the presence of a .forward file. If any arguments are given, they are assumed to be valid logins, and the home directory of each one is checked. If the special argument ALL is given, the passwd entry in the /etc/nsswitch.conf file is checked, and all password entries that can be obtained through the switch file are checked. In large domains, this can be time-consuming. OPERANDS
The following operands are supported: login Where login is a valid user name, checks the home directory for login. ALL Checks the home directory of all users. FILES
/etc/mail/sendmail.cf Defines environment for sendmail /etc/mail/aliases Ascii mail aliases file ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWsndmu | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ SEE ALSO
getent(1M), sendmail(1M), aliases(4), attributes(5) SunOS 5.11 10 Nov 2003 check-permissions(1M)
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