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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

mail::verify

Mail::Verify(3pm)					User Contributed Perl Documentation					 Mail::Verify(3pm)

NAME

       Mail::Verify - Utility to verify an email address

SYNOPSIS

	   use Mail::Verify;

DESCRIPTION

       "Mail::Verify" provides a function CheckAddress function for verifying email addresses.	First the syntax of the email address is checked,
       then it verifies that there is at least one valid MX server accepting email for the domain.  Using Net::DNS and IO::Socket a list of MX
       records (or, falling back on a hosts A record) are checked to make sure at least one SMTP server is accepting connections.

ERRORS

       Here are a list of return codes and what they mean:

       0      The email address appears to be valid.

       1      No email address was supplied.

       2      There is a syntaxical error in the email address.

       3      There are no DNS entries for the host in question (no MX records or A records).

       4      There are no live SMTP servers accepting connections for this email address.

EXAMPLES

       This example shows obtaining an email address from a form field and verifying it.

	 use CGI qw/:standard/;
	 use Mail::Verify;
	 my $q = new CGI;
	 [...]
	 my $email = $q->param("emailaddr");
	 my $email_ck = Mail::Verify::CheckAddress( $email );
	 if( $email_ck ) {
	     print '<h1>Form input error: Invalid email address.</h1>';
	 }
	 [...]

perl v5.8.8							    2002-06-09							 Mail::Verify(3pm)