The blackmailer has most probably (99%) spoofed your email address meaning that the
person has sent you the email from an IP address not belonging to your e-mail service_x000D_
provider, for example 197.14.168.139, with your email address as sender (it is absulutely_x000D_
possible), for example name.surname@domain.se._x000D_
By openning complete message info in your email user agent (outlook or what ever) _x000D_
and scrolling down to the end of its info text, you will find from which IP address the _x000D_
email was originated and I am pretty sure that it does not belong to your email providers_x000D_
server, something like: _x000D_
Received: from [197.14.168.139] (unknown [197.14.168.139])_x000D_
by domain_name_of.your.service_provider (providers email server) with ESMTP id 1234E5D67F89C