In this post I will go through basic mail relay server install and set-up. I installed this in my Jira server to send the Jira, Confluence and Bitbucket server notifications out.
————- THIS POST IS WORK IN PROGRESS —————–
sudo yum update sudo yum install -y postfix sudo cp /etc/postfix/access /etc/postfix/access-sender sudo vim /etc/postfix/access-sender
Add below lines to the end of the file. This will allow email to go out from only those three emails and nothing else.
sudo cp /etc/postfix/access /etc/postfix/access-recipient sudo vim /etc/postfix/access-recipient
Add below lines to the end of the file to make sure emails can be sent just to the list of recipients mentioned in the file. If emails are meant to go to any address then leave this file with no change.
each time you update these files need to execute below command to update the lookup table database.
sudo postmap /etc/postfix/access-sender sudo postmap /etc/postfix/access-recipient
Update the configuration file to use access lists:
sudo vim /etc/postfix/main.cf
update these lines
77 myhostname = mail.yourserver.com
85 mydomain = yourserver.com
102 myorigin = $mydomain
688 # Only allow sender from sender_access
689 #smtpd_send_restrictions = permit_mynetworks, check_sender_access hash:/etc/postfix/sender_access, permit
690 smtpd_delay_reject = yes
691 smtpd_sender_restrictions = check_sender_access hash:/etc/postfix/access-sender, reject
692 #smtpd_recipient_restrictions = check_recipient_access hash:/etc/postfix/access-recepient, reject
Note line 692 is commented out to ignore the recipient access list.