I want to send an email on my computer, but I want the sent day set to 3 days ago.

I don't want to change the date on the receivers end, as I don't believe that's possible, but just on my end.

I went to edit in NotePad++, but it seems the email is encrypted.

I am using Microsoft Exchange, if that's relevant.

  • You would have to change the date on the client and the server, even if you do that, it won't change the data of the recipient, who will still only recieve it today. – Ramhound Sep 13 '16 at 16:40
  • @Ramhound I'm not worried about the recipient, but rather just on my end. So I need to change my time on my computer, and what else? – User Sep 13 '16 at 16:42
  • Please read my original comment again. – Ramhound Sep 13 '16 at 16:43
  • @Ramhound and the Microsoft Exchange server? How is that even done? – User Sep 13 '16 at 16:50
  • 1
    I don't think it is possible without help from your Exchange Administrator. Why do you want to do it anyway? It sound like an XY Problem – DavidPostill Sep 13 '16 at 17:04

You would need to know the exchange server's address for SMTP access. Once known, This can be achieved by connecting to the server on port 25 and using the "Date" Permanent Mail Header Field Registration keyword within the DATA (Body) of the email when composing.

For example:

telnet your.exchange.server 25

Send the following once the session is established.

MAIL FROM:<from@email.address.com>
RCPT TO:<to@email.address.com>
Date: Sat, 21 May 2016 05:33:29 -0700
From: Tester <from@email.address.com>
Subject: Dr Who
To: to@email.address.com

I sent this email from the future, but wasn't sure how long it would take for you to receive it.

Source - https://tools.ietf.org/html/rfc4021

Other Source: http://www.samlogic.net/articles/smtp-commands-reference.htm , good reference incase if anonymous smtp is not permitted as well.

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