ACNL is changing of mail server today, Sept 4th, 2020. The mail migration will start at 12.00 LT AMS.
It is possible that your email is not delivered to ACNL (undeliverable). If you receive such notification, please delete the email address from the memory and enter the email address manually in the addressee line.
Should you still encounter problems, please do not hesitate to contact ACNL.