Okay, so I don't can overcome the manual step by clicking several times with the appropriate time delay the button "Fehlgeschlagene Einladungen erneut senden" (e.g. mailgun provider 100 mails per hour)?
You have sent the maximum number of invites that can be sent in one batch in your configuration - please click 'Fehlgeschlagene Einladungen erneut senden' to send the next batch
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