I receive this error when a customer sends an email via the contact form. The email is sent and received but the error still pops up. I tried to figure out how to shut off just the contact form option in Jetpack but that is apparently beyond me. Please take a look at this error and let me know if this the Jet Pack Plugin and if so what I can do to fix it. Otherwise great plug in and thanks!
Cannot modify header information - headers already sent by
(output started at /home/blendedmarket/comainevent.com/podcast/wp-content/plugins/sharebox/lib/forms/box_template.php:15) in /home/blendedmarket/comainevent.com/podcast/wp-includes/pluggable.php on line 876