Using PHPMailer6 breaks campaigns with the inline powered image

[michield]

With PHPMailer6 I got an error in rendering with the Powered By image.

@bramley can you check if it works for you?

When I send the phpList.com homepage as a campaign, it renders like this

The only thing I can find at the moment is that in the source of the campaign, there is no spacing between the Body of the HTML section and the inline image

[bramley]

I have tried both phpmailer 6 and 5, also different values for the html encoding and the email shows the phplist home page correctly

But this is entirely within my desktop, no external mail server is involved.
Your screenshot seems to show new-line characters (x0A) in the MIME headers being quoted as =0A. Possibly the email is being mangled en route.
Is the result different using phpmailer 5?

[michield]

Do you have the Powered By image enabled?

Yes, it works fine when I switch to phpmailer5

[bramley]

Yes, the powered by image is enabled. I have just sent using gmail smtp and the received email was also displayed properly.
what is the value for HTMLEMAIL_ENCODING? I tried 8bit and quoted printable.

phpmailer 6 seems to have reworked the handling of line breaks but that should have improved the situation rather than making it worse
https://github.com/PHPMailer/PHPMailer/blob/master/changelog.md#version-60-august-28th-2017

[bramley]

I have just sent a test email to your @phplist.com address to see how that is displayed. It will appear to be from my gmail address.

[michield]

Strange, I haven't received it yet. What was the subject?

[michield]

When I set encoding to 8bit it works better, but it has the boundary in the content at the top. That may indicate the issue. I'll keep digging. Sounds like it may be something on my local system, but it's working fine when I switch to an older branch.

[bramley]

Sorry I had not realised that the "send test" had not worked. Should be there now with subject "Test web page".
The google web client seems to make a mess of the layout though, seems to be confused by the rotating images and shows them all (the section with the Raspberry Pi image plus others).

[michield]

Yes, got it this time. Thanks. The source has the same no-empty-line between the HTML content and the inline image, so that saves me trying to figure that one out, because it clearly is not the issue. The HTML page renders perfectly. Hmm. I'll keep looking. Must be something on my local system. I still want to know what it is though.

[michield]

Ok, ran a test sending via gmail and it works fine. You're right about the rendering in Gmail itself, I guess that could do with looking at. So, the problem must be with Mailhog, which is what I use for my local test setup. I will see if I can file a bug report with them.

[bramley]

Possibly related to mailhog/MailHog#206