problem with sendmail and su

[Nicolas Letellier]

Hello.

I use FreeBSD 7 with sendmail. I have a problem for sending email. More
precisely, with the sender of the mail.
When I'm logged to my machine in root, the mail is sent with
"root at mymachine.com" with sender. OK, no problems.
When I'm logged to my machine in nicolas, the mail is sent with
"nicolas at mymachine.com" with sender. OK, no problems.

However, when I'm logged in nicolas to my machine, and if I do a "su
root" or "su - root", and I send a mail, the sender will be
"nicolas at mymachine.com" and not "root at mymachine.com".

It's a problem, because I done a "su" to be logged as root.

I don't have this problem with a FreeBSD/Postfix.

Thanks for your advices and helps. I don't understand this problem.

Regards,

-- 
 - Nicolas.