E-Mail Benachrichtigung funktioniert nicht

Hi,

The email function in Joomla/Virtuemart works without the plugin activated or installed without any problems (using sendmail. TLS, port 465). For example when using the "ask a question about this product" link the email is sent immediately after input of all fields. As soon as I activate ECC+ and reload the updated system and try to send using the same function, nothing happens. I can click on the "send" button and the page does not forward to the confirmation page. I can see in the lower left corner of the browser (firefox) that it tries to connect. But it just quits after a while. I also don't receive any emails.

I would be grateful for any clues.

I have also added screenshots of the settings. I hope this helps.

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