BR might be seen at the end of an email from a polite stranger. Example:
Dear <your name>
I like really your blog about <whatever>. Tell me what do you think would happen if <whatever>
Thank you for your time
BR ,
<name>
Dear <your name>
I like really your blog about <whatever>. Tell me what do you think would happen if <whatever>
Thank you for your time
BR ,
<name>
by mrob27 February 16, 2016