Hello,
I tried to contact the support by email, but received the following reply:
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This is the mail system at host mailout08.t-online.de.
I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can
delete your own text from the attached returned message.
The mail system
<membersupportemea@isc2.org>
host us-smtp-inbound-2.mimecast.com[205.139.110.221]
said: 550 Administrative prohibition - envelope blocked - https://community.mimecast.com/docs/DOC-1369#550 [VFpFeMfqOLu4ScCioh0ieg.us208] (in reply to RCPT TO command)
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Because I registrated my user account for testing with domain "@t-online.de" (big german telco provider ->Deutsche Telekom) I can not contact you.
So please change/delist the domain from this protection, to be able to contact the ISC2 support.
BR
