Heads Up! Virus on the list?

Hello all, I don't run the firewall or the virus protect at corporate, but the firewall just sent me this mail. Not being the mail admin, I'm not sure exactly what it means, but take it for what it's worth, I guess. (I removed our corp domain from the text below) ------------------------------------------------------------------------------------- Virus protection has detected a virus TROJ_NAVIDAD.E in your mail traffic from php-db-return-6234-cmayo=my.work.domain.was.here@lists.php.net on 01/29/2001 17:02:37 and has been deleted. Please inform the sender of this message of the fact that they are not able to send you your email due to the virus contained. Please make sure that any other versions of this file you might have stored locally are cleaned. Contact your local support representative for assistance.