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Securing SMTP with SSL

Posted on 2004-04-12
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Last Modified: 2010-03-18
Current Configuration:
I am currently using Sendmail and OpenWeb mail. Both seem to work flawlessly. I am using SSL to retreive mail imap-s port 993. I want to secure outgoing mail using ssl. Security on my system appears tight, I get daily attempts by spammers to relay mail, but so far, so good I hope. I am pretty sure I need to open port 495 with IP tables. I am using Red Hat Advanced Server. Is there lines in the sendmail.mc and use m4 for the sendmail.cf? Do I need to specify this port in /etc/services file? What else needs to be configured?

Thanks
Christyjo
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Question by:christyjo
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pablouruguay earned 500 total points
ID: 10806613
       O SmtpGreetingMessage=$j Sendmail $v/$Z; $b

        O Privacy Options=authwarnings

        O HelpFile=/usr/lib/sendmail.hf
 

to:

        O SmtpGreetingMessage=

        O Privacy Options=authwarnings noexpn novrfy needmailhelo noetrn

        O HelpFile=
 



you can check this url too.

http://www.linuxjournal.com/article.php?sid=4823

and this more coplete article.

http://www.ists.dartmouth.edu/IRIA/knowledge_base/linuxinfo/sendmail-ssh-how-to.htm
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Author Comment

by:christyjo
ID: 10813798
Hi:
I checked my sendmail.mc and none of the above files are listed. The only statement that is close is:
confPRIVACY_FLAGS
I have read the articles, and will digest them and try the suggested changes.
I will respond back
ChristyJo
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by:pablouruguay
ID: 10813828
yep because this modifications are in /etc/mail/sendmail.cf not in the mc file. :)
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Expert Comment

by:pablouruguay
ID: 10832407
any comments? work this solution?
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