UTF-8 email problem

Hi i have problem with contact form. My site run on Azerbaijani language. But have one problem. UTF-8 characters (ə,ü,ö,ğ and anymore) not supporting. Contact form not sends email with utf-8 characters.
Please help.

Demo here: http://kreditxeber.com/kredit-sifarisi/#tabs1-bankofbaku

https://ww.wp.xz.cn/plugins/contact-form-7/