On Sun, Sep 7, 2025 at 6:16 PM Tobias Bussmann <t.bussmann@gmx.net> wrote:

Am 05.09.2025 um 20:23 schrieb Jonathan S. Katz <jkatz@postgresql.org>:
> This has plagued me for years, and I'm so happy you tracked this down!

I'm happy to hear, I'm not the only one seeing this. Glad to help!

What's more amazing is that AFAIK this is the first time *anyone* has reported this to be a problem. And it's been this way since 2020...

It is also slightly ironic that it's apple mail that's seeing the problem, given it's quite overrepresented in *generating* broken attachments in similar ways when you look in the archive :)

> The patch looks good; have you tested in a few other mail clients? I haven't had a chance to test yet.

I haven't tried other mail clients myself, but as the style definition is just redundant to the img attributes, I wouldn't expect any regression by this. But HTML emails are full of miracles ;)

Indeed it does. For example, you mentioned the possibility of embedding the image instead of attaching - that *does* break multiple clients, I think at least Outlook and maybe also gmail.

Litmus.com has become quite expensive for render previews, so I looked for alternatives. I found Testi.at, which offers some free tests at least. Unfortunately, I was unable to provide the full MIME structure there and thus could not simulate the CID-referenced image that causes the problem in Apple Mail. When I experimented with an externally hosted image, the result looked good in the provided previews. However, I visually identified another issue: Outlook does not seem to support the 'float' style attribute [1 footnote 1]. In the v2 patch, I implemented a workaround to duplicate the 'float' style using an 'align' img attribute. Previews of the resulting rendering can be found at [2].

PGEU does have a subscription to a service that could be used for testing. We'd need to adapt the test instance of the website for it, but that's fairly easy to do.