Javamail to send message with a custom messageclass to outook exchange

Question

Hello,
I developed a microsoft outlook addin which added a custom message class to our outlook exchange. Now if a user sends a message of type "IPM.Note.OurCustomForm"; the recipient gets our custom addin when the message is received. My question is, is there any way to use JavaMail to send a message from our server, which is all in Java, which the Microsoft Office exchange will pick up as the "IPM.Note.OurCustomForm"; message class and display my addin.
Some example code, or reference to similar problems would be appreciated, I have not programmed in Java since I graduated many a years ago :). Also, I was hoping to do this without using third party software (unless it is free), but I would none the less appreciate information about them too.
Thanks much,

Answer 1

I know nothing about Exchange, so all I can give you is a general approach to
solving this problem. Remember that Exchange is full of Microsoft proprietary
features that are not defined by any standard or specification.
You need to learn how to construct a MIME format message that is equivalent
to the new Exchange-proprietary message you created. One way to do that would
be to use JavaMail (or some other non-Outlook email client) to read a message of
that type from Exchange and examine the MIME structure of that message. That
should give you enough information to construct a MIME message using JavaMail
that has the same structure (MIME types, headers, etc.).
The second part is constructing the actual content of the message. Since you
created the new custom message class, maybe you already know how to do that.
But if you used a tool to do that you might not understand the raw format of that
message, in which case you may need to reverse engineer the format by reading
sample MIME messages in that format.
Does that help?