The easiest way to do this is to work with your Exchange admins to set up a server-side delivery filter that triggers on a special header and source. For example, a filter that says For all mail origniating from <your SMTP server> and containing the header 'X-AddToSent: yes', move to <recipient's Sent Mail folder>

Ideally, you'd implement some kind of strong authentication as well, so that no malicious individual can add to Sent folders by spoofing IP addresses. For example, you might cause your app to cryptographically sign the message and have Exchange use that as the criteria for determining the origin of messages.

Then, all you'd have to do is either (a)add an Fcc: or Bcc: header to the outgoing mail containing the sender's address, or (b)send another copy of the mail to the sender.

Of course, you could always just Bcc: the sender a copy of the message and provide instructions for users to set up filters instead...

To save the message on the Exchange server you can use IMAP - you can use the append method with Mail::IMAPClient for instance to do this.

/J\

    $imapp = Mail::IMAPClient->new(    Server      =>    'servername,
                                       User        =>    'userid',
                                       Password    =>    'password',
                                       Uid         =>    1,
                                       Debug       =>    0
                                  );
    $tempuid = $imapp->append_string("Sent Items", $messagestring ,"\\
+Seen");
    $tempuidarray->[0] = $tempuid;
    $imapp->set_flag("\Seen",$tempuidarray);
    if(!$tempuid){warn "ERROR saving to sent items: $@\n"; }
[download]

I don't know what LAMP is

Linux, Apache, Msql, P(erl|HP).

--MidLifeXis

Thanks. And thanks to radiantmatrix for the link http://onlamp.com/.

It seems that while I did not know the acronym, I have been in the LAMP world for years.

First, the quick and cheesy way. Send a receipt to the sender's email, and then have them use a mail filter on their side to simply move it from the Inbox to Sent Items. Simple and effective, but the user would have to have the filter set up.

To really do this, I believe you would need to use a Windows box with Outlook installed. Then use MAPI to send mail from a program on the Windows side. Perl MAPI code example. You will need the user's password for this to work. You could have a service running on Windows that listens for a connection from the LAMP side, and then sends the mail this way.