How do DKIM Domain Keys Identified Mail and SPF Sender Polic

How do DKIM (Domain Keys Identified Mail) and SPF (Sender Policy Framework) use DNS?

Solution

Domain Keys Identified Mail(DKIM) uses Domain Name System(DNS) for publishing of Public Keys. If any party wants to validate a signature, it can easily find the required key i.e., public key. When DKIM deployed in the conjunction with the Domain Name System Security Extensions(DNSSEC), DKIM provides strong mechanism to assure the origin of email.Without the benefits of DNSSEC, DKIM represents a step in the right direction.

Sender Policy Framework (SPF) is used for fighting against spam. This protocol is used as standard methods for fighting against spam in the Internet.SPF record is one of the TXT record which is a part of domain\'s DNS zone file. TXT record specifies list of authorized host names or IP addresses from which mail can originate for a given domain name.Once entry is placed in DNS zone, no further configuration are needed to take advantage of servers that incorporate SPF checking into their anti-spam systems