Question: How to send Email with only attachment and no body?

[ageir]

Problem description

I'm sending emails to an API/System.
The mail can not have multipart.
The mail should not contain a body.
Only a file attachment.

I tried allowing empty body, but it's creating multipart mail anyway.

How can I send an email with only one part that is an attachment?

I read the documentation but can not find how to do it.

[Synchro]

PHPMailer doesn't support arbitrary MIME structures, only a few common ones. While this makes it easy to send common text+HTML+attachments messages, it also means you don't have control for more unusual structures. You could try setting the ContentType to your MIME type and assigning it to Body, like this:

$mail->ContentType = 'image/png';
$mail->Encoding = PHPMailer::ENCODING_BASE64;
$mail->Body = file_get_contents('my_img.png');

I'm not 100% sure that will work, but it's worth a try!