This is a HTML email and your email client software does not support HTML email!

This is a HTML email and your email client software does not support HTML email!

I have a small business, recently the email notification is coming like this to me, can anyone please help me? I am not so IT savvy 
-----=_NextPart_b4583c76c623900f59ad5b420c6da260
Content-Type: multipart/alternative; boundary="----=_NextPart_b4583c76c623900f59ad5b420c6da260_alt"

------=_NextPart_b4583c76c623900f59ad5b420c6da260_alt
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 8bit

This is a HTML email and your email client software does not support HTML email!
------=_NextPart_b4583c76c623900f59ad5b420c6da260_alt
Content-Type: text/html; charset="utf-8"
Content-Transfer-Encoding: 8bit

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<