Письмо с заказом приходит в закодированном виде

День добрый.
После оформления заказа приходит письмо на адреса администратора и клиента в закодированном виде, судя по всему base64. Подскажите в чем может быть проблема?

Заголовки:

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To: nonaxxxx@gmail.com
Subject: xxx: Восстановление пароля
Date: Tue, 24 Mar 2020 11:15:49 +0300
From: “xxxxx” info@xxx.ru
Message-ID: 30ffd6925d8735be602562181835a10a@xxx.com
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Content-Type: multipart/related; boundary=“b1_30ffd6925d8735be602562181835a10a”
Content-Transfer-Encoding: BASE64

–b1_30ffd6925d8735be602562181835a10a
Далее тело письма

Кусок из тела письма:
gaW5saW5lOyBmaWxlbmFtZT1jc2ltZzMucG5nCgoKCgotLWIxX2JhMzY0
YTUzNzMyMTUxM2EyNGMyYzcwZThjMjE0OTM0CkNvbnRlbnQtVHlwZTogaW1hZ2UvcG5nOyBuYW1l
PSJjc2ltZzQucG5nIgpDb250ZW50LVRyYW5zZmVyLUVuY29kaW5nOiBiYXNlNjQKQ29udGVudC1J
RDogPGNzaW1nNC5wbmc+CkNvbnRlbnQtRGlzcG9zaXRpb246IGlubGluZTsgZmlsZW5hbWU9Y3Np
bWc0LnBuZwoKCgoKLS1iMV9iYTM2NGE1MzczMjE1MTNhMjRjMmM3MGU4YzIxNDkzNC0tCg==
Спасибо