This is the mail system at host mailfilter-ng-2.sunet.se.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

<anna.orre-remaker@kau.se> failed: host 130.243.19.82 said: 550 5.1.10
 RESOLVER.ADR.RecipientNotFound; Recipient not found by SMTP address lookup (in
 reply to EOD command)