Changing Local Domain Names to Internet Domain Names in Postfix Configuration

1) Edit the Postfix Configuration File:

nano /etc/postfix/main.cf

Paste the following lines at the end of the file:

smtp_generic_maps = hash:/etc/postfix/generic

relayhost = 192.168.55.11

myhostname = Freepbx26.viznitzny.com

mydomain = viznitzny.com

myorigin = freepbx26

2) Edit the Generic Mapping File:

nano /etc/postfix/generic

Add the following mappings at the top of the file:

root freepbx26@chvrm.com root@chvrm.local freepbx26@chvrm.com root@freepbx freepbx26@chvrm.com root@freepbx.chvrm.local freepbx26@chvrm.com asterisk freepbx26@chvrm.com asterisk@chvrm.local freepbx26@chvrm.com asterisk@freepbx26 freepbx26@chvrm.com asterisk@freepbx26.chvrm.local freepbx26@chvrm.com

3) Apply the Generic Mapping:

sudo postmap /etc/postfix/generic

sudo service postfix reload

4) Restart Postfix Service (If Needed):

sh
sudo service postfix restart

5) Test Email Sending:

echo "This is a test" | mail -s "Test 26" ambiorixg12@gmail.com

6) Check Postfix Logs:

sh
tail -f /var/log/maillog