Is valid in email address?

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Tags

1. #characters
2. #organisations
3. #hotmail
4. #alphanumerics
5. #hyphen
6. #example
7. #services
8. #underscore
9. #practice
10. #addresses
11. #special
12. #email
13. #often
14. #technically
15. #accept
16. #clients
17. #despite
18. #allows
19. #range
20. #creation
21. #using
22. #which
23. #windows
24. #servers
25. #valid