JSFiddle - React, Tailwind, and code Playground

HTML

<form>
                            <input name="emailaddress" type="email" id="mail-form" placeholder="E-mail" class="mail-form">
                            <div class="mail-but"><button></button></div>
                       </form>

CSS

.mail-form
{
	position: relative;
	width: 255px;
	height: 46px;
	border: 1px solid #b9b9b9;
	background: #fff;
	border-radius: 26px;
	z-index: 1;
}
input#mail-form
{
	padding-left: 20px;
}
.mail-but button
{
	position: relative;
	width: 22px;
	height: 22px;
	background:url(../images/arrow2.png);
	background-repeat:no-repeat;
	text-decoration: none;
	border: 0;
	top: -38px;
	left: -15px;
	z-index: 10;
}