" textarea " multilines PHP/ HTML : I am using php and html codes in same file for contact form.

When I write multilines in html form (textarea): 

(name="TBody" cols="100" rows="10" class="largertextarea" required="required" placeholder="Leave A Message Here"), 

the php received the information and put all of them in same line :

$body = $_POST["TBody"];
$msgbody = "- Message is about:" . "<br>" . $body;

For example : 

Hi,
Hope all are fine.
Bye.

What I receive in email is like this :

Hi, Hope all are fine. Bye.
         
So, how can I put them in multilines ?

Thanks in advance for your help.