Incompatible with Elastic Email plugin

Emails get sent as Raw HTML with Elastic email plugin,

<div style="background: #f5f5f5; color: #333; font-size: 14px; line-height: 20px; font-family: Arial, sans-serif;">
<div style="width: 600px; margin: 0 auto;">
<div class="header" style="border-bottom: 1px solid #ddd; padding: 20px 0; text-align: center;"><strong style="font-size: 20px;">DMA</strong></div>
<div class="content" style="padding: 10px 0 40px;">
<p style="font-size: 14px; line-height: 20px; color: #333; font-family: Arial, sans-serif;">Welcome kenneth1.</p>

I have tried to enable/disable Enable WPAutoP for emails but nothing works.

However if i disable Send all email through elastic email, it send normally.

I must have elestic emaiol enabled as its server side email