Issue with headers using fsockopen for ESMTP connection on php

Question

I send email without a problem but when i look on the headers i can see that before of the ones i create appears "X-Mailbox-Line: " and i have no idea why, does any one knows why ?

An example:

X-Mailbox-Line: From : <contacto@nidida.com>
Reply-To: <contacto@nidida.com>
MIME-Version:  1.0

Answer 1

通常X- *标头是由接收方SMTP添加的，因此您的代码不是问题！