Yes, sinnlos-mail.de can receive emails.
No, sinnlos-mail.de is a throwaway domain and should be blocked.
You can use MailCheck's free API to automatically block throwaway emails. Read our documentation to get started. No registration required.
A record
62.75.241.223
MX records
mail.mailgw.net
62.75.241.223
mail.mailgw.net
62.75.241.223