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Disable Outgoing Mail

 
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Old 10-28-2008
Disable Outgoing Mail
I have a Solaris 2.6 server running sendmail (Version 8.9.3p2). It actually receives email and runs the sendmail process. I need to configure it so that it continues to receive email, but disable its ability to send email out. My initial ideas was to just rename the mail and mailx binaries. But then I thought that might be a little too ugly. I then did some research and found that I could change a parameter called “DeliveryMode” to “deferred”. Apparently, this will withhold outgoing email. From there, I believe I could just create a cron job that would rm the contents of /var/spool/mqueue every couple of hours or so.

Can you tell me if this would thoroughly prevent email from going out? Or if there is a better way to do this?

The thought also occurred to me that I could alter outgoing mail so that ALL of it is directed to /dev/null or to a dummy email address (which is valid, but is really just another way to route to /dev/null). Is there a way to do this? Possibly using some config of the /etc/mail/aliases file?


Thank you very much for your assistance,
Rosko
 
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LEARN ABOUT DEBIAN

kuvert_submit

KUVERT_SUBMIT(1)						   User Commands						  KUVERT_SUBMIT(1)

NAME

       kuvert_submit - MTA wrapper for mail submission to kuvert(1)

SYNOPSIS

       kuvert_submit [sendmail-options] [recipients...]

DESCRIPTION

       Kuvert_submit submits an email either directly to sendmail(8) or enqueues it for kuvert(1) for further processing.  kuvert_submit should be
       called by your MUA instead of your usual MTA to enable kuvert to intercept and process the outgoing mails. Please see your MUA's
       documentation about how to override the MTA to be used.

       Kuvert_submit transparently invokes "/usr/sbin/sendmail" directly if it cannot find a ~/.kuvert configuration file, or if the -bv option is
       given. Otherwise, it enqueues the email in the queue directory specified in the configuration file.  If that fails or if the configuration
       file is invalid, kuvert_submit prints an error message to STDERR and terminates with exit code 1.  On successful submission, kuvert_submit
       terminates with exit code 0.

       Kuvert_submit also logs messages to syslog with the facility "mail".

OPTIONS

       If it runs the MTA directly then kuvert_submit passes all options through to /usr/sbin/sendmail. Otherwise, it ignores all options except
       -f and -t (and -bv which triggers a direct sendmail pass-through).

       -f <emailaddress>
	   Sets the envelope sender. Kuvert_submit passes this on to kuvert.

       -t  Tells an MTA to use the recipients in the mail instead of any commandline arguments. If -t is not given then kuvert_submit passes the
	   recipients from the commandline on to kuvert.

FILES

       ~/.kuvert
	   The configuration file read by kuvert and kuvert_submit. If not present, kuvert_submit calls /usr/sbin/sendmail directly.

       ~/.kuvert_queue
	   The default queue directory.

SEE ALSO

       kuvert(1)

AUTHOR

       Alexander Zangerl <az@snafu.priv.at>

COPYRIGHT AND LICENCE

       copyright 1999-2008 Alexander Zangerl <az@snafu.priv.at>

       This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as
       published by the Free Software Foundation.

Mail								    2009-03-16							  KUVERT_SUBMIT(1)