Here's a test submission I sent to myself:
What happened?This is a multi-part message in MIME format.
--b1_G4btMXUsxrUpvPamvidDw9OpeVPiG5w62yZXzZq62vk
Content-Type: text/plain; charset=us-ascii
Von: Daniel Bollinger d.bollinger@gmx.de
Nachricht:
[url=sdfjhdgkfhjlkfulfpagehttps://hochzeiten.danielbollinger.de/kontakt/]sdfjhdgkfhjlkfulfpagehttps://hochzeiten.danielbollinger.de/kontakt/[/url]
--b1_G4btMXUsxrUpvPamvidDw9OpeVPiG5w62yZXzZq62vk
Content-Type: text/html; charset=us-ascii
<strong>Von:</strong> Daniel Bollinger <a href='mailto:d.bollinger@gmx.de'>d.bollinger@gmx.de</a>
<br>
<br>
<strong>Nachricht:</strong>
<br>
<br> sdfjhdgkfhjlkfulf<br><br><strong>page</strong><br>https://hochzeiten.danielbollinger.de/kontakt/
--b1_G4btMXUsxrUpvPamvidDw9OpeVPiG5w62yZXzZq62vk--
This only happens here: https://hochzeiten.danielbollinger.de/kontakt/
Submissions from https://www.danielbollinger.de/kontakt/ are still normal.