What is the difference between Courier and regular mail?

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Tags

1. #private
2. #managed
3. #pallets
4. #through
5. #things
6. #services
7. #packages
8. #postal
9. #service
10. #items
11. #letters
12. #businesses
13. #public
14. #regular
15. #large
16. #courier
17. #stock
18. #transport
19. #bulky