Do I need reverse DNS?

Related questions

1. Why PTR record is created in DNS?
2. What is DNS SRV lookup?
3. What should my PTR record be?
4. What type of record is used for DNS reverse lookup?
5. What is DNS AAAA record?
6. What is the difference between forward resolution and reverse resolution?
7. How long can a TXT record be?
8. How does DNS TXT record work?
9. How long does an a record take to update?
10. What is Autodiscover SRV record?

Tags

1. #mails
2. #outgoing
3. #exist
4. #internet
5. #however
6. #configured
7. #server
8. #servers
9. #application
10. #address
11. #particular
12. #reject
13. #which
14. #important
15. #incoming
16. #reverse