I'm running on Joomla 4.0.2 with PHP 7.4.3, JDSCF 1.10. The module has no position. It is loaded inside an article, so that it is shown in Component area of the layout (Astroid One).
In the global configuration i have set that the php mailer is used (see screenshot) and the testing mail function works correctly.
I have also attached the mail options here. The fields (Name and Mailadresse) are the same like in the form layout.
The module options screenshot showing my module config. The chrome console after submitting the form is also attached as a screenshot.
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