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Encrypted Secure Email in Office 365

So you’ve rolled out email, yay! But have you enabled your users to send secure encrypted email?  It is a very underused feature among small- and medium-sized businesses.  This makes me kind of sad because every business sends some personal data that should be protected. Quotes, bids, specifications, drawings, credit card information, health questions, benefits, or employment information, if sent via email should be sent in a secure manner.

Configure Sendmail as a Smarthost and rewriting the from-address

  1. Install both the sendmail and sendmail-cf packages on your Redhat/CentOs server.  Use the command: yum install sendmail sendmail-cf 
  2. To automatically start sendmail to start on system boot we issue the command: chkconfig sendmail on 
  3. To start sendmail NOW we issue the command: service sendmail start 
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