macOS High Sierra Blank Emails from PayPal

Do you have reason to think this is a High Sierra issue? (I've only tried to reproduce it on Sierra and I don't see any problems.)

The emails are HTML only (bad behavior of PayPal), but this shouldn't be a problem. Do you use any of the “prefer plain text” related settings in MailMate?

The reason I think it is a High Sierra issue is that I only see it when running High Sierra (I have a cloned High Sierra partition so can switch easily). Like you running Sierra the emails display ok. I also have the beta running on a Macbook which has the same issue.

I don't have the "Prefer plain text" option checked.

Thanks, I'll reboot in High Sierra later and see if I can reproduce it. (It's just surprising that there should be a difference.)

I am, by the way, only seeing the issue with the second attachment.

Ok thanks benny, that’s the same as I see here.

All emails from PayPal including and before (chronologically) the good one display ok and all subsequent ones are blank just the light grey frame where the body would appear.

I've now reduced the problem to the following HTML code:

<html>  
<head>  
<style type="text/css">  
    td { line-height:22px; }
</style>  
</head>  
<body>

<table>  
  <tr>
    <td style="font-size:0px;"> </td>
  </tr>
</table>

This is not displayed...

</body>  
</html>

A font size of 0, a styled line height of 22 and a non-breaking-space in a table are in play here. It's possible that it can be further reduced.

Now, I tried to reproduce this issue in a clean new Xcode project and I cannot do that. Something I do in MailMate somehow triggers this bug in the WebView, but this is hard to track down and it might not even be something I can change. I'll give it some more thought.

For the record, I tried updating to 10.13.1 (developer preview). It did not fix the issue. I'll explore other options. It's a surprisingly frustrating bug :)

Perfect, thanks Benny. Sorry to have given you such a tricky issue.

That's not your fault. I'm just sorry that I couldn't find a better fix...