Manual unsubscribe from schema.org mailing list

Dear administrator,
please remove archinf@archinform.de and sascha@archinform.de from the
schema.org mailing list. I tried to do it by sending an email to the
request email address and by using the website, but both was unsuccessful!
For more information, please have a look on the appropriate thread from me
in the mailing list.
Many thanks, Sascha