Masquerading a From address in the format servername@mycompany.local in sendmail

- Oracle Linux 5.10 - Sendmail version 8.13.8 I'm attempting to send email from a linux server to an Exchange Server and have it delivered to an external address. Emails are currently being delivered to the exchanges server but are not being forwarded. The exchange admin at our company tells me that I need to masquerade the From: address to be in the format of servername@mycompany.local. I currently have the following values set in sendmail.mc: dnl MASQUERADE_AS(`gordmans.com')dnl dnl MASQUERADE_DOMAIN(gordmans.com)dnl I am still getting a ctladdr in the maillog of "servername.mycompany.net", which is the same as the output of hostname -f How do I configure sendmail to send the right From: address?