Yes, ru.com can receive emails.
No, ru.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
141.8.226.34
MX records
cluster8.eu.messagelabs.com
46.226.52.104
cluster8a.eu.messagelabs.com
18.194.175.153