allpeaches on "[Plugin: Contact Form 7] Getting Red Box error : Failed to send your message. Please try later or contact"

I'm using Contact form7 3.3.3 in my website and using WP-SMTP Mail plugin. When I test sending mail thru the SMTP test button it works but when I use the contact form that I have created it throws the Red Box error.

Settings on Contact form 7:
Mail:
To - someid@mywebsite.com,someid2@mywebsite.com
from - visitor@mywebsite.com

Mail2:
To: [your-email]
From: someid@mywebsite.com

On the Smtp settings page:
From Email: visitor@mywebsite.com

Any help will be appreciated... Please :)

http://wordpress.org/extend/plugins/contact-form-7/