DNS 

What is DNS?

The Domain Name System (DNS) is the phonebook of the Internet. All Internet users access the information website through domain names, like google.com or gmail.com. Web browsers communicate through Internet Protocol (IP) addresses. DNS converts domain names to IP addresses so browsers can load Internet resources.

Each device connected to the Internet has a unique IP address which other device use to find the device. DNS servers eliminate the need for internet user to memorize IP addresses such as 154.195.1.1 (in IPv4), or more complex alphanumeric IP addresses such as 2500:gh00:2848:2::g669:d7a2 (in IPv6).

What is a DNS record?

DNS records are instructions that present in authoritative DNS servers and gives information about a domain including what IP address is associated with that domain and how to handle requests for that domain.

What are the most common types of DNS record?

A record :- The record that holds the IP address of a domain. 

AAAA record :- The record that contains the IPv6 address for a domain (as opposed to A records, which list the IPv4 address). 

CNAME record :- Forwards one domain or subdomain to another domain, does NOT provide an IP address. 

MX record :- Directs mail to an email server. 

TXT record :- Lets an admin store text notes in the record. These records are often used for email security.

SOA record :- Stores admin information about a domain. 

SRV record :- Specifies a port for specific services. 

PTR record :- Provides a domain name in reverse-lookups. 

Not receiving emails?

Make sure Mx records on your domain is pointing to Mx records of Google as shown in below image.

If it is not pointing to Google Mx records then contact your domain/hosting provider to update the same, you can refer to the below records to be updated.