The records you will meet.
A
Points a name at an IPv4 address.
The record sending your domain to your hosting.
AAAA
The same, for an IPv6 address.
CNAME
Points a name at another name.
Cannot coexist with other records at the same name, which is a common source of conflict.
MX
Directs email for the domain to mail servers, with priorities.
TXT
Holds text. Used for verification and for mail authentication.
NS
Declares which nameservers are authoritative.
SRV
Identifies the location of a service, used by some applications.
CAA
States which certificate authorities may issue certificates for the domain.
PTR
Maps an address back to a name, used in reverse lookups.
WHAT MATTERS MOST FOR A TYPICAL SITE
A, MX, and the TXT records for mail authentication.
WHAT BREAKS MOST OFTEN
A CNAME conflicting with something else at the same name.
