Thanks,
I've managed to successfully use the timezone function you mentioned. Just one thing: how do I remove the EST at the end of the time or better still change it to AEST? Also regarding the function, I read on the php site about the possible errors that occur if the timezone isn't valid, eg.
"Note: Since PHP 5.1.0 (when the date/time functions were rewritten), every call to a date/time function will generate a E_NOTICE if the timezone isn't valid, and/or a E_WARNING message if using the system settings or the TZ environment variable. "
Does this mean that if someone uses the form in a different timezone that they'll get an error?
When it comes to Outlook and the color for the background can you check on the source of the email message to see if the background color css made it through? I'm wondering if the styling was stripped from the message before it got to you. 
I've just checked the source code and yes the background color css came through but it's just doesn't seem to be rendering.
