MailPoet blocks Contact form 7 autoresponder

Dear all,

I have previously reportet a problem of our contact form 7 not sending to autoresponder email adresses (real email and mail-tag alike) but sending to the “To”-recipient (only the first one, though, not to multiple ones.

We have now found out that the active mail poet plugin is inhibiting the sending. We do not know how and why, though.

Any ideas?

What we have checked already is:
– all settings within contact form 7 are correct
– cache has been emptied prior to new attempts to send and we have logged out and in multiple times
– we have tried multiple browsers

Thank you and greetings, Sarah

The page I need help with: [log in to see the link]