<form action="mailto:qwerty@mail.ru" type="post" enctype="text/plain">
<label for="subj">Тема:</label><br />
<input type="text" id="subj" name="Subject" /><br /><br />
<label for="body">Текст:</label><br />
<textarea id="body" name="Body" rows="5" colls="20"></textarea><br /><br />
<input type="submit" value="Отправить письмо" />
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https://medium.com/design-startups/b53319616782