How to restrict a user to send mail locally only
Sometimes, we need to restrict a specific person to send mail inside your organization only. He will not be able to send mail outer domain except your allowed domain but S/He can receive mail from anywhere. To implement this restriction, we have to configure the restriction which is given below: Step:1 Specify the account for which the restriction is applied. echo "test@example.com restrict_sender" > /opt/zimbra/postfix/conf/restrict_senders Note: If you would like to restrict all users of a domain, enter the domain name instead of email ids. For example: echo "yourdomain.com restrict_sender" > /opt/zimbra/postfix/conf/restrict_senders Step:2 postmap /opt/zimbra/postfix/conf/restrict_senders Step:3 Create a blank file in which no domain name is specified. touch /opt/zimbra/postfix/conf/restrict_recipients Step: 4 postmap /opt/zimbra/postfix/conf/restrict_recipients Step:5 vim /opt/zimbra/conf/zmconfigd.cf Find the "SECTION mta DEPENDS amavis&quo