Now, this actually took me a while to figure out, what actually is happening, when, where and why.
What happened?
Senders of a certain form complained that they didn't receive a copy of their inquiry.
While I tested the form (extensive) I never had any issue; then I had the idea that iPhones c/would be the source of the problem (there are reports about that in the wild) but soon issues added up also with Android and PC users.
Long story short, this is my problem:
The website-owner does receive a copy of the form. Always.
The sender occasionally does receive a copy - as I meanwhile found out not depending on his device, but depending on his mail provider.
I found that this has been discussed five years ago:
viewtopic.php?f=7&t=72356&start=15 - or actually this: viewtopic.php?p=320093#p320093
As I ticked the box to receive a carbon copy of all incoming mails and sent one to myself I saw the difference:
The mail to the website-owner has full details "WEBSITE-OWNER NAME <name@example.com>"
…while the copy to the form sender only has the first part, the name only "WEBSITE-OWNER NAME < >"
Hence a number of mail providers (mine obviously not) filter this email as SPAM out.
Independent of any possible fix in future releases - is there anything I can do right now?
I read my self through a number of class files but really couldn't figure out where the form is being transformed to an email and where I could possibly "inject" the mail address of the website-owner (at least temporary) by manual.
Your help is greatly appreciated! ♥
The form is live unfortunately and so I'd love to fix it ASAP … I'm just lacking of developers qualities.
All of them.
Thank you very much!

