How to send mail from linux shell as another user

[dpicella]

Using the root account, I would like to send some routine emails to my users from the shell using a different default email so that if a user replies it does not go to root@myhostingdomain

I recently changed from Fedora to Cent OS. I noticed the "mail" command in CentOS does not have to -r option that is available in Fedora.

# man mail

[...]
-r address
Sets the From address. Overrides any from variable specified in
environment or startup files. Tilde escapes are disabled. The
-r address options are passed to the mail transfer agent unless
SMTP is used. This option exists for compatibility only; it is
recommended to set the from variable directly instead.
[...]

Is there a better way to do this?

[BorderAmigos]

You could do it with the php mail command. Set up a small php script that sends your mails then run it from the command line.