mail(): can it reply with quoted text?

I wrote an ultra basic mail interface as a part of my client's customer administration area to handle emails. Basically, the standard email form gets stored in a database, and when they respond to the help request, they fill out the form and PHP emails the message. Now, they want to have the original email appear as a part of their reply. I could use wordwrap() at around 70 characters and have every line appear with the traditional '>' to indicate the replied text. It doesn't seem to be a very elegant solution for mail clients that reflow quoted text (not certain how to explain this, but Opera's mail client does it). Is there a way to for mail() to include quoted text like it was actually replying to an actual mail client would? -- Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/