[BlueOnyx:01420] 'On behalf of' in the address from Sendmail

[Support]

Hello,

I am trying RMail to send email by PHP and I get;

	Apache [apache at domain] on behalf of Sender [sender at domain]

I have created the user but I still cannot figure out how to stop the 'on
behalf of' being added by Sendmail.

RMail does not authenticate but seeing that there is no external connection
to this machine for any services then I don't think it will be a problem if
I have to globally allow 'unknown senders'.

Tony