Send automated emails at later /future date

Send automated emails at later/future date, specific date, later known date to known senders

1. For sending email from gmail to others at later date

for gmail link gmail account using IMAP with Mozilla thunderbird client .
steps can be found below,

http://www.wikihow.com/Send-an-Email-at-a-Specific-Time-in-the-Future-Using-Mozilla-Thunderbird

http://lifehacker.com/314574/turn-thunderbird-into-the-ultimate-gmail-imap-client

2. Other websites providing facilities to send email at later date using your existing gmail,yahoo, hotmail accounts

a) http://www.lettermelater.com/

LetterMeLater.com allows you to send emails at any future date and time you choose.

A handy feature missing from most email services is the ability to delay sending email.

  This service, you can write emails with your existing email address.

b) http://www.timecave.com/timecave/index.jsp

c). http://www.rightinbox.com/

other sources:
http://www.thinkingserious.com/2008/03/10/how-to-send-email-at-a-specific-time-with-gmail/


http://www.seeques.com/16398157/automated-email-date.html