XenForo Mail has 'Auto-Submitted: auto-generated' header - won't respond to it

[borussemd]

Hi
if we get mails from the contact us form we are unable to set a autoresponder to them.
Received Mails seems to have the correct Sender Adress.
Our provider send us these logs:

Feb 6 09:42:53 host261 autoresponder[2075772]: C2D64280AE1: Mail has 'Auto-Submitted: auto-generated' header - won't respond to it.
Feb 6 09:42:53 host261 postfix-local[2075771]: C2D64280AE1: autoresponder: stderr: PASS
Feb 6 09:42:53 host261 dk_check[2075773]: C2D64280AE1: DKIM Feed: No signature
Feb 6 09:42:53 host261...

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