Do all email addresses have?

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Tags

1. #general
2. #identifies
3. #jsmith
4. #consists
5. #example
6. #address
7. #format
8. #local
9. #domain
10. #parts
11. #specific
12. #symbol
13. #recipient
14. #often
15. #username
16. #email
17. #mailbox
18. #before