It looks like you have characters in your import file that should not be there, like ö and é.
By default AcyMailing doesn't allow ümlauts or Chinese/Cyrillic characters in email addresses, you can however enable use of these characters in Acymailing->Configuration->Mail settings to allow any character. I'm not sure if this also works for the import.
Normally you should not have these caracters in your mail addresses. You can read more about allowed characters here: https://en.wikipedia.org/wiki/Email_address#Local-part