Interesting Mail Header Question

hi,
I want to bind all outgoing mails from my organisation to projects.

i am planning to write a php script which will list all my projects . User will select a project and then send a mail to the client.
I will make an entry in my database which will have from , to , mesasage , attachment etc .... . Now when the client replies to that mail , it will reach my mail server and my php script will find out the project asscociated with that mail and place the project id in the database along with the received mail.

So when i run a report after selecting a project i can list all outgoing and incoming mails regarding that project.

Now to implement this when user selects a project and sends a mail , i would like to send the projectid as an additional header along with the mail so that when the client replies back, the same project id should come back to me so that i can grep it and relate that to the project.

I dont know hot to implement this. (Am using smtp for sending and pop for receiving)

Thanks in advance

Cheers
prasanna

when your client replies, the message will probably NOT have any custom header you may use in outgoing mail

But, if you track your outgoing message-ID: headers, including something specific to each project, then replies _should_ quote that in a References: header. But this wont work for new mail that isnt replying to a message of yours


hope this helps !