Yes, qa.team can receive emails.
No, qa.team 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
104.24.100.180
MX records
mxa.mailgun.org
52.11.9.113
mxb.mailgun.org
35.169.255.110