Configuring outgoing mail on Red Hat 8

Can somebody tell me please how to configure the email system to send all outgoing mails through an specific server? And not using DNS?


We are connected to the Internet through a cable modem and all emails must go through the mail server of the isp (uit.telenet.be) .

The system is putting all outgoing mail on /var/spool/mqueue and all of them have the error message "connection time out with *destination_mail_server" .

(where destination_mail_server is the mail server associated to the destination email-address).

I was told it is because SMTP is using DNS and it should forward all of them to uit.telenet.be.

I will really appreciate any help
Thanks

Best regards
JdV

If you are using sendmail then simply add below code in your sendmail.cf file

DSsmtp:smtp.yourisp.net

replace smtp.yourisp.net with your service provider smtp server address.

in my case its look like

DSsmtp:smtp.aol.com