Yes, poltekba.ac.id can receive emails.
No, poltekba.ac.id 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
103.229.72.32
MX records
7d647202e4a762b842051e7ec60ff2fbd7fa2867.msv1.invalid
7d647202e4a762b842051e7ec60ff2fbd7fa2867.msv1.invalid
alt1.aspmx.l.google.com
64.233.186.26
alt2.aspmx.l.google.com
74.125.193.26
aspmx.l.google.com
173.194.205.26
aspmx2.googlemail.com
64.233.186.27
aspmx3.googlemail.com
74.125.193.26
aspmx4.googlemail.com
66.102.1.26
aspmx5.googlemail.com
173.194.79.26