i have this problem. I need to use another server SMTP for send email. I have contact a company who provide me a server with IP / Login and password. I have set this data info >webmin>Server>Postfix Mail Server>SMTP Authentication And Encryption
I have set: Send outgoing mail via host------ i have set ip of server
SMTP login to outgoing mail host
Login and password.
I have set this date but not work.
How can i resolve my problem?