Yes, postfach.cc can receive emails.
No, postfach.cc 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
185.50.232.53
MX records
mx01.easyname.eu
146.255.61.215
mx02.easyname.eu
77.244.243.35