Hello,
I am running RedHat 9.0 on my linux box as my personal server for my web and email. I have a concern with my mail program. I was experimenting with an email program on my PC desktop. I entered a completly different email account and was able to send email via SMTP. I assume it was SMTP. in the STMP entry slot, I had mail.myserver.com.
While I have it set up so that I need a password to read my mail, it did not seem to need one when I sent email. I assume anyone could be, and probably is, using my server to send email.

How do I change my setting so only I and the people I authorized can use mail.myserver.com to SEND mail?

Can you walk me through the steps here, or point me to a tutorial online that covers this?

Thanks,

There are ways to do it with either setting up relay rules or using usernames and passwords but it would help if we knew what software you were using.

Hello All.
I am an idiot. When I was testing this, I only sent email to myself. So while the profile was someone else, I was always sending email to myself. When I tried later to send email from the bogus email account to my yahoo account, the Sendmail script on the server promptly told me that "relaying denied, please check recipient". So it's not broken, it was just user error. Life is good.
Thanks,
Coffee