Super Ninja Mailtos
Mailtos are a convenient way to let your audience offer feedback on your Web site or to arrange other contact information. But you can do a lot more with a mailto than just automatically generate an email message. Super Ninja Mailtos can automatically CC: and BCC: people--or even fill in the subject line. Here's how to customize your mailto functions.

Your basic mailto looks like this:

<A href="mailto:person@builder.com">
Click here to send a boring old mailto message</a>.

When users click the link, it brings up their email client with the recipient's email address prepopulated in the To: field. Snore. To spice it up, follow these steps.

Step One 
Create your regular mailto with the main recipient's email address, as you normally would.

Step Two 
To copy (CC:) someone on the email, follow the To: recipient's email address with ?cc=. The example below shows how the code should look:

<A href="mailto:person@builder.com?cc=second_person@builder.com">
Click here to send an email message to multiple recipients</a>.

Step Three 
To blind copy (BCC:) someone on the email, follow the CC: recipient's email address with &bcc= (as you add these features, the first one begins with a ? and subsequent ones begin with a &). It should look something like this:

<A href="mailto:person@builder.com?cc=second_person@builder.com&bcc=third_person@builder.com">
Click here to send an email message to multiple recipients (only some of which you know about)</a>.

You can also separate numerous To:, CC:, and BCC: recipients by commas:

<A href="mailto:person@builder.com, second_person@builder.com">
Click here to send an email message to multiple comma-delimited recipients.</a>

Step Four 
To prepopulate the Subject: field, follow steps 1 and 2 with &subject=. For spaces, use the escaped version, %20. The whole string--with To:, CC:, BCC:, and Subject:--should look like this:

<a href="mailto:person@builder.com?cc=second_person@builder.com&bcc=third_person@builder.com&subject=
This%20is%20only%20a%20test">Click here to send us super ninja email</a>.

Here's an example of the whole thing in action: Click here to send us super ninja email. Note: this trick only works with standards compliant email clients.