Use the Pickup Directory for Message Delivery

An alternative method of sending e-mail is to compose a message in a word-processing program, save it as a text file, and copy it to the Pickup directory. Exchange moves the e-mail to the Queue directory immediately and processes it for delivery.

You can include e-mail envelope information in the text file, but it is not required. The "x-sender" header identifies the sender. The "x-receiver" header identifies a single recipient. If you want to include multiple recipients, add an "x-receiver" header for each recipient. The headers must appear first in the text file, with the "x-sender" header listed first. There must also be an extra carriage return/line feed (CRLF) before the body of the message is typed. Press ENTER or RETURN to add an extra line before typing the text of the message. Add another blank line after the text and Exchange will insert the necessary formatting at the end of the file.

x-sender: adam@nwtraders.microsoft.com
x-receiver: suzan@nwtraders.microsoft.com
From: adam@nwtraders.microsoft.com
To: suzan@nwtraders.microsoft.com
Subject: Hello from Adam

Hello. 

Note   For best performance, compose the message in a directory other than the Pickup directory, and then copy and paste it to the Pickup directory. If you write the message while in the Pickup directory, Exchange continually attempts to pick up the file and process it. If the file is open, it cannot be processed.