Yes, username.e4ward.com can receive emails.
No, username.e4ward.com 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
104.236.202.39
MX records
mx1.e4ward.com
192.184.84.108
mx2.e4ward.com
198.199.103.158
mx3.e4ward.com
173.255.225.96