Sendmail – control who can send relay
Sendmail use “access” database to control who can use this email server to send email out. It’s easy, just edit this file /etc/mail/access , but access is a database file, after you edit it you need to recreate database map makemap hash /etc/mail/access < /etc/mail/access Put your control list in the at the end of the file: [email protected] REJECT cyberspammer.com REJECT TLD REJECT 192.168.0 RELAY 192.168.1 OK REJECT: reject all email from that source RELAY: allow that IP range to use our server as a relay. OK: allow to send any email even though it’s blocked in some other rules.Read More →