Yes, mm5.se can receive emails.
No, mm5.se 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
69.197.18.174
MX records
mx.zoho.com
204.141.42.121
mx2.zoho.com
216.52.72.121
mx3.zoho.com
136.143.190.52