A- record is used to find the computer from a name
.Like any website Domain xyz.com ->
any ip address.
Used to map a name to a compter. Used for resolving
addresses.works on ipv4 system .
AAAA-(quad a record ) similar to A record but it can
point to ipv6 address .
SYNTAX of AAAA
name ttl
class rr ipv6
TXT
– GENERALLY used to hold general information for a domain
name .
Like
hosting,person,phone number.
Common
use in spf which is used to verify a host if it is allowed to send an email on
the host.
MXrecord
or mail exchange record
This
is to used to determine where to deliver the email.it must be mapped with a
record because if MX record is not found it can be delivered to root of the
domain.
Configuration-
Name
– the domain name .
Server
– the server where email will be delivered like mail1.xample.com
Ttl(time
to live )- it is a time in seconds that this rocord will be cached in other
system .
MX level
CNAME(canonical names )
It maps one name to another name.
Like you have docs.abc.com and documents.abc.com you can add
a cname and automatically point documents to docs.
Difference between a record amd cname is that a record point
to an ip which is stable .cname points to
a name not an ip.
SPF(sender policy framework)
It is used to specify form which server I would be sending
emails
The parts of the SPF record
mean the following:
|
v=spf1
|
SPF version 1
|
|
mx
|
the incoming mail servers (MXes)
of the domain are authorized to also send mail for example.net
|
|
a:pluto.example.net
|
the machine pluto.example.net
is authorized, too
|
|
include:aspmx.googlemail.com
|
everything considered legitimate
by gmail.com is
legitimate for example.net, too
|
|
-all
|
all other machines are not
authorized
|
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