onlinesbs on "[Plugin: Contact Form 7] “Your message was sent successfully” , bt I never receive a mail"

“Your message was sent successfully” with green border, but I never receive a mail for that.

I am having this problem wherein i am not getting mails even though its showing successfully sent.

Have tried deactivating all Plugins & Tried in vain
Tried even changing the Mx Record in Vain

Plz Help

http://privatelimitedcompany.in/contact-us/

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