Messaging 25

Sometime may be you have internal & external domains configured in your organization and you don't want allow internal users to send emails outside the organization or to the public domains. You can achieve this using Microsoft Exchange Transport rules. Suppose you have all internal users in OU name "InternalMail" create a distribution group in the OU and add all internal users as member. Open up Exchange admin console " https://yourexchangeserver/ecp " and navigate to "mail flow" -> "Rules" Click the + button -> " Restrict messages by sender or recipient " In this example " extblk " is a distribution group. Added two conditions first is " the recipient is located " second is " the sender is a member of " Review the Rule mode is set to "Enforce" and leave other settings default and save the rule. You are done !

Step 1: Install Prerequisites sudo apt-get install makepasswd rcs perl-doc libio-tee-perl git libmail-imapclient-perl libdigest-md5-file-perl libterm-readkey-perl libfile-copy-recursive-perl build-essential make automake libunicode-string-perl libauthen-ntlm-perl libcrypt-ssleay-perl libdigest-hmac-perl libfile-copy-recursive-perl libio-compress-perl libio-socket-inet6-perl libio-socket-ssl-perl libio-tee-perl libmodule-scandeps-perl libnet-ssleay-perl libpar-packer-perl libreadonly-perl libterm-readkey-perl libtest-pod-perl libtest-simple-perl libunicode-string-perl liburi-perl cpanminus Sudo apt-get install libssl-dev Step 2: Install Perl Modules sudo cpanm JSON::WebToken Test::MockObject Unicode::String Data::Uniqid Step 3: Download IMAPSYNC Tool git clone git://github.com/imapsync/imapsync.git Step 4: cd imapsync Step 5: mkdir dist Step 6: sudo make install Note: May be you find the following error while compiling the tool; What you have to do before using imapsync: Install Perl mo