Sendmail Error while sendmail mail
Hi there ,
I have configured sendmail in RedHat Linux 8.0 and I am facing problem while sendmail mail.
When I sendmail mail from the server to any mail server on the internet it works fine, but when I connect to Linux server from Microsoft Outlook Express I get error message as follows
"The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'firstname.lastname@example.org'. Subject 'Test1', Account: '22.214.171.124', Server: '126.96.36.199', Protocol: SMTP, Server Response: '550 5.7.1 <email@example.com>... Relaying denied. IP name possibly forged [188.8.131.52]', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79"
184.108.40.206 -- linux Server and 220.127.116.11 -- Firewall
I have allow every thing on firewall for linux and I have configured Sendmails MTA to operate on 18.104.22.168.