Linux: Sendmail setup and forwarding root email to an external server

1. yum install sendmail

2. yum install sendmail-cf

3. nano sendmail.mc
Add smart host
define(`SMART_HOST’, `[your.smtpserver.com]’)dnl
*Make certain your smtp server is set to allow connections from your ip*

If you want your sendmail to accept remote connections add dnl:
dnl DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA’)dnl

4. ./make sendmail.cf

5. service sendmail restart

6. nano /etc/aliases
root: [email protected]

7. newaliases

8. nano /etc/hosts
127.0.0.1 servername.domain.com localhost servername
::1 localhost6.localdomain6 localhost6
172.22.2.122 mailhost smtpmailserver.yourserver.com

9. echo “This is a test” | mailx -s “A test mail” root < /dev/null

To test is you are accepting SMTP traffic
telnet yourservername 25

HELO yourservername Like I am 🙂

MAIL FROM:root@yourservername My address

RCPT TO:therename@yourservername Your address

DATA

text message for therename. This is text message