Yes, 126.com can receive emails.
No, 126.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
123.126.96.210
MX records
126mx00.mxmail.netease.com
220.181.15.209
126mx01.mxmail.netease.com
220.181.15.141
126mx02.mxmail.netease.com
220.181.15.145
126mx03.mxmail.netease.com
220.181.15.193