Setting up sendmail over SSL on Ensim Pro Control Panel for Linux

Setting up sendmail over SSL on Ensim Pro Control Panel for Linux

Login as root on your Ensim Pro Control Panel for Linux box

Backup your current sendmail conf file

cp /etc/mail/sendmail.cf /etc/mail/sendmail.cf.bak

Prepare sendmail’s certificate

cd /usr/share/ssl/certs
make sendmail.pem

You will be prompted with several questions typical for SSL certificate generation)

Backup /usr/lib/opcenter/sendmail/install/sendmail.mc file

cp /usr/lib/opcenter/sendmail/install/sendmail.mc /usr/lib/opcenter/sendmail/install/sendmail.mc.bak

Edit /usr/lib/opcenter/sendmail/install/sendmail.mc file

vi /usr/lib/opcenter/sendmail/install/sendmail.mc

Uncomment the following lines to point to your generated certificate

define(`confCACERT_PATH’,`/usr/share/ssl/certs’)
define(`confCACERT’,`/usr/share/ssl/certs/ca-bundle.crt’)
define(`confSERVER_CERT’,`/usr/share/ssl/certs/sendmail.pem’)
define(`confSERVER_KEY’,`/usr/share/ssl/certs/sendmail.pem’)

Add DAEMON_OPTIONS to make sendmail listen on port 465
DAEMON_OPTIONS(`Port=smtp,Addr=0.0.0.0, Name=MTA’)dnl
DAEMON_OPTIONS(`Port=smtps, Name=SSLMTA, M=s’)dnl

Rebuild sendmail conf file

m4 /usr/lib/opcenter/sendmail/install/sendmail.mc > /etc/mail/sendmail.cf

Restart sendmail

/sbin/service sendmail restart

You can check if sendmail is listening on 465 port by issuing command

netstat –nlp | grep 465

Reference: http://parallels.com

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