7 DMARC tools used for Email Domain Security
#1: DMARC Record
What is the DMARC Record?
DMARC (Domain-Based Message Authentication, Reporting, and Conformance) record is one of the DMARC tools with an email authentication technique. It uses DMARC records to inform the email receiver that the domain is set up for DMARC. The DMARC record contains the policy which your domain owner wants to use. In essence, the DMARC records the DNS (Domain Name Service) entry. You can start using DMARC by implementing a DMARC DNS record. This DMARC record will be used by email receivers who have implemented DMARC. This will help you in keeping track of all the messages which you have been sent to your domain taking your DMARC policy into account.
Do you need a DMARC record generator and analyzer tool?
In the beginning, organizations often face confusion in following instructions that are meant for setting up records. This can include issues related to syntax and content. One of the most frequent mistakes you can face is the improper use of wildcard domain name system entries. With the help of this tool, DMARC records can be set appropriately for your email domain. These entries can return both non-DMARC and DMARC records (including DKIM keys and SPF records). These records are stored in the form of a TXT record with ‘_dmarc’.
When you’re using DMARC you can set up a policy to define how you want receivers to handle emails that fail the DMARC checks.
You can choose one of these 3 DMARC policies:
- None: This policy helps you to just monitor the results and do not take specific action for failing messages. Use this policy to start gathering DMARC reports and analyzing the data in those reports.
- Quarantine: This helps you to put the emails which fail the DMARC checks in quarantine. This mostly means that receivers will place these messages in the junk folder.
- Reject: This helps you to reject all messages which fail the DMARC checks. The receivers should do this ‘on SMTP level’ which means the messages will bounce directly in the sending process.
#2: SPF RECORD
What is an SPF record?
Sender Policy Framework or SPF record is one of the DMARC tools with an email authentication strategy that helps you to identify whether emails that claim to be sent from an IP address are actually approved by the administrators of that domain. The record is in the form of DNS TXT which contains the list of authorized email servers that can send an email on the behalf of your domain name. SPF records defend your domain by preventing spammers from sending messages with bogus
From: addresses attached to your domain.
What does an SPF Record do?
SPF does not see through the senders’ email address but the IP address. A Sender Policy Framework helps you by registering a record of the pool of IP addresses against the senders’ email server. When your email reaches the receiver’s end, the receiver starts checking the SPF record based on the DNS record and authenticates your email. When the email authentication is finished, your email is sent and is visible in the inbox of the receiver.
How does SPF Record help your email domain?
SPF helps in increasing the chance of your email landing in the inbox by building up trust with ISPs. Along with DMARC and DKIM, it serves as an extra layer of security that reduces backscatter bounces and error notifications. Your email will be delivered without trouble as SPF ensures that your email is secured against any type of spoofing.
DMARC analyses your SPF record and provides a report that allows the experts within your organization to set the record appropriate for the organization.
#3: DKIM RECORD
What is the DKIM Record?
Domain Key identified Mail (DKIM) uses the DNS TXT record with a special format. It is one of the DMARC tools. When an email is sent, it signs the email with a private key and this is validated by the public key in the DNS. This public key is recorded in the DNS TXT record, which is used by the receiving server to verify and validate the email. These records are revoked and renewed based on the different providers. Unlike the SPF, which can only register 10 records in the DNS TXT record, DKIM can store many records based on the various sending sources.
Why do we need a DKIM record?
While DKIM is not required, emails signed with DKIM appear more legitimate to recipients. It is less likely that the mail will move to either Junk or Spam folders. Just like SPF, DKIM is required for DMARC which is a newer standard for reducing email spoofing.
DKIM provides a way for ISPs to track as well as build a reputation on the domain’s sending history. This reputation is portable and will allow you to control your reputation as well as sending practices across multiple sources.
DMARC record generator and analyzer tool which also helps in verifying whether a domain has set a DKIM record or not. In case the record is not set, the tool will allow you to set a DKIM record.
#4: MX RECORD
What is an MX Record?
A Mail eXchanger record or MX Record specifies the mail server which is responsible for accepting email messages on the behalf of a domain name. MX records are DNS records that are necessary for email delivery. It is one of the important DMARC tools.
Example of an MX record
Shown below is an example of MX record 0 mail.EXAMPLE.com
MX records consist of two parts:
- the priority Here, ‘0’ is the priority.
- Lower the number, higher is the priority.the domain name.
For example, when you type www.EXAMPLE.com into the web browser, DNS lookup that name in order to determine the IP address of the server to which it connects. The domain name is EXAMPLE.com.
The ‘mail.EXAMPLE.com’ is the mail server to which the priority connects. This varies with what the company is hosting your email.
How to check MX Record?
MX records are compulsory in case you want to customize the email address for your domain. The email servers check the MX records of any server of any email domain before sending them an email. If the MX record is not present, then you cannot send emails.
With DMARC’s MX Record tool, you will be able to see if a domain has an MX record. You simply need to enter a domain name and it will display the MX record of that domain if it has been set up.
#5: AAAA RECORD
What is an AAAA record?
AAAA Records is a DMARC tool with the most basic type of DNS records and is used to point a domain or subdomain to an IP address. Assigning a value to an AAAA record is as simple as providing your DNS management panel with an IP address to where the domain or subdomain should point and a TTL. The AAAA record is similar to the A record of the DNS. Like the A-record, an AAAA-record (also known as quad A-record) maps the name of your domain to an IP address. On one hand, the A-record works with IPv4 whereas the AAAA-record works with IPv6.
AAAA Record Format
An AAAA record is structured and it is configured the same way as an A record but it is larger. The resource record type value for AAAA records is 128. Eight groups of 16-bit values are used to notate AAAA records. The AAAA record is defined in RFC 3596.
where <address> is an IPv6 address and looks like 2400:cb00:2049:1::a29f:1804.
In DNSimple, the AAAA record is represented by the following customizable elements:
|Name||The hostname for the record without the domain name. This is generally referred to as “subdomain”. We automatically append the domain name.|
|TTL||The time-to-live in seconds. This is the amount of time the record is allowed to be cached by a resolver.|
The same IP can be defined with different names. It is not required for IP addresses to be in the same subnet or to use the same routing prefix. For preventing unintentional duplicate definitions, arrange AAAA records in either ascending or descending order.
Not too long ago, it was realized that the world would eventually run out of IPv4 addresses, so IPv6 addresses were developed. These longer addresses allow for an astronomical number of unique addresses and won’t be in short supply for a very long time. Since we developed a new address type, we also had to create a new record type to support it –hence the addition of AAAA records.
With the help of DMARC, you can view the AAAA record of your email domain.
#6: TXT Record
What is TXT record?
The ‘TXT’ (Text ) record is a DMARC tool that lets your domain administrators enter text into the DNS record, as it was originally intended as a place for human-readable notes. However, now it is also possible to put some machine-readable code into TXT records as well. A TXT record is a resource record that helps you to provide the ability to associate text with a zone. This record allows domain administrators to insert any text content into DNS records. These records are used for various purposes.
An example of TXT record:
v=spf1 include:_spf.google.com ~all
Every record can have either one or more than one-character strings. Traditionally, these text fields were used for a number of non-standardized uses including an organization’s name or the address of a host.
DKIM record: This record helps you to store important information that is used for the validation of email in transit.
DMARC record: DMARC records helps you in mitigating email spoofing attacks.
SPF record: You can use this record for indicating to mail exchanges about hosts that are authorized to send mail for the domain.
Site Verification Records: This record helps you in proving the ownership of a domain and it can also be used for associating services including G-Suite or Microsoft 365 to a specific domain.
With the help of DMARC, TXT records are displayed in detail so that these can be analyzed in detail by the organizations.
#7: DNS CHECK
What is DNS Check?
The DNS Check test is one of the DMARC tools that runs a comprehensive DNS Report for your domain. A DNS lookup is done directly against the root servers (or TLD Servers). Then we query each name server to make sure your DNS Servers all respond, measure their performance, and audit the results against common best practices. Check the current domain name or hostname from multiple DNS nameservers and resolvers from all around the world. Instant propagation check. This DNS checker for domain performs a thorough DNS propagation lookup for any domain name and analyzes the DNS data collected to confirm whether that website is completely propagated or not.
To learn more about DMARC and DMARC tools, click here: https://kdmarc.com/