I didn't want to use it for the purpose I have in mind
Not sure what you have in mind but the majority of mail over the internet is performed using SMTP (Simple mail transfer protocol).
Perhaps you should tell us what your trying to achieve ?
About fudging the time an email is sent....I'm wondering if things used to be different with earlier versions of Windows because I'm fairly certain the fellow in question did it from his work computer and we just had basic programs--nothing fancy. But I could be wrong.
You can easily falsify the date/time a mail was sent - within smtp you can specify the origination time.
However due to spam etc and people using the date/time to put it in the future meaning theirs would always appear on the top of the list in date order most have stopped regarding the date and time on the original email and resort to using the time/date received.
Unless you are using a mail scheduler - a server receiving email will report what was sent and also date stamp it with its own metrics allowing a more accurate picture of what has gone on.
Again - tell us what your trying to achieve ?