sendmail -f, -F option

Hello,

I have been trying to use 'sendmail' command to create the illusion of emails sent from my server actually coming from a webmaster server. Kinda how like spam mail works.

syntax im using:

# /usr/lib/sendmail -t - F 'Webmaster' -f 'webmaster@email.com'
From: webmaster@email.com
To: user@someemail.com
Subject: Feedback Form
Hello World !
.

When the email is received by user@someemail.com, the "From" header displays 'webmaster@email.com' instead of 'Webmaster'.

I want it to display 'Webmaster'.

Can anyone please help ?

Note: these are invalid email addresses

by the way im running Linux RedHat 6.2

I think that From line should read:

From: Webmaster <webmaster@email.com>

Yea it works ... Thanks