platinumshore on "[Plugin: Contact Form 7] contact form 7 - wpcf7_before_send_mail"

Not totally sure on this action, but I suspect you want..

wpcf7_do_something_else($wpcf7) to become wpcf7_do_something_else(&$wpcf7)

- note the & as you need to pass the arguments over as reference, else $wpcf7 will be kept local to the function.

Hope it helps.