Below is a detailed description of how entire email validation process works:

- Email address syntax check:

This process will remove any improperly formatted email addresses. The email addresses are validated according to the IETF standards.

 

- Domain/MX records check:

This process will check the DNS entries of an email address. When the domain is invalid or MX entry is missing, the process will mark this email address as invalid.

 

- Role-based Account detection:

Role-based account email addresses such as postmaster@, info@, sales@, admin@, etc. will be detected and flagged appropriately.

 

- Disposable email address (DEA) detection:

Throwaway/disposable email addresses or junk collector email addresses will be detected and processed appropriately. These email addresses are used for one-time use to sign up or to bypass login form with providing a valid email address.

 

- HoneyPot/Spam trap detection:

This process will detect spam seeds, BOTs, honeypots, black list or bogus emails addresses. In this process, all the emails are checked against the known list of email address/domains used for trapping spammers.

 

- Checking DNSBLs and URI DNSBLs for blacklisting:

A DNS-based blackhole list (DNSBL) or Real-time Blackhole List (RBL) is a list of IP addresses which are most often used to spamming. A URI DNSBL is a DNSBL that lists the domain names which are found in the body of spam email messages, but generally not found inside legitimate messages. In this process, email address or IP address is checked against the known DNSBLs and URI DNSBLs to trap spam networks.

 

- Final verification:

This phase performs deep level SMTP verification on each email address. Each email address will be verified for mailbox existence without sending actual emails on that address.