Oo mail problems synonym

Here are some synonyms for "mail problems":

1. Postal issues
2. Delivery difficulties
3. Communication breakdowns
4. Email glitches
5. Technical hiccups
6. Connectivity issues
7. Server problems
8. Network errors
9. Transmission failures
10. Message delays
11. Package problems
12. Shipping issues
13. Receiving difficulties
14. Sending issues
15. Delivery delays

Note that some of these terms may be more specific to certain types of mail (e.g. email, postal mail, package delivery), while others may be more general and applicable to a range of communication methods.