timer email
 

Let's say I draft an email, and want to send it out tomorrow 3pm,
can I do this timing?

Gmail, yahoo mail , hotmail do not have this option. :(

You can use the Google calendar to do that, just set up date and time and use the email reminder function.

If you want to do it locally ie on your own server, see the 'at' cmd http://linux.die.net/man/1/at.
Obviously for a repeated job, use cron instead.

I don't mean calander,
I mean an email sent to a person on specific date and time.

You can do it using the at command, like chrism01 suggested, in combination with the Mutt mail-client or other mail-clients that can send mails from the commandline.
A short search on the web also revealed this solution, using Thunderbird and GMail: http://www.thinkingserious.com/2008/...me-with-gmail/