Mail server misconfiguration is also known by the term Email Spoofing. It is like forging the email address of someone. By spoofing, the original identity of the email sender can be kept hidden from the email recipient.
Causes for Email Spoofing:
Domain not listed in the SPF record
Missed DMARC protocol
SPF (Sender Policy Framework) is a type of Domain Name System (DNS) that helps to avoid the Email Spoofing problem. The DMARC protocol uses SPF to determine the authenticity of an email. Adding a signature to your email domain will reduce the chance of marking the email as spam.
You must use a subdomain instead of using a top-level domain while sending the email.
Update your DNS record as well as Sender Policy Framework and Mailbox Exchange records.
Checking if your email address is included in the SPF and DMARC records is mandatory. This will reduce the chance of email spoofing.
Impact of email spoofing problem is such that anyone can share fake messages using a company’s email. As a result, the company might lose its reputation.
The other method to prevent the mail server misconfiguration problem is DKIM (Domain Key Identified Mail). This uses a cryptographic key that helps to validate the incoming messages. This method is commonly referred to as a replay attack.
A list of reasons for Email Spoofing is listed here.
Hiding the true identity of the sender
To avoid spam blacklists
To access the personal assets by pretending to be someone whom the recipient knows before.
To perform identity theft
Tarnishing the image of the sender
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