Postfix Restrict Senders or Recipients

This section describes how to allow/reject a specific sender or a specific domain.

1. Edit the file /etc/postfix/main.cf and add the line below.

[root@mailserver ~]# vim /etc/postfix/main.cf

[root@mailserver ~]# cat /etc/postfix/main.cf

…

…

# add as Sender and Recipients Restriction

smtpd_sender_restrictions = check_sender_access hash:/etc/postfix/sender_access

..

[root@mailserver ~]#

2. Create the file /etc/postfix/sender_access and review the example below.

[root@mailserver ~]# vim /etc/postfix/sender_access

[root@mailserver ~]# cat /etc/postfix/sender_access

janedoe@acme.local REJECT

bugsbunny@acme.com OK

acme.com REJECT

[root@mailserver ~]#

3. Create /etc/postfix/sender_access file to database

[root@mailserver ~]# postmap /etc/postfix/sender_access

4. Restart Postfix Mail Service

[root@mailserver ~]# service postfix restart