Email verification database  is the process of checking whether an email address is valid, has a deliverable mailbox and is associated with a domain name. It is an essential step to ensure that your email campaigns reach their intended recipients and do not land in spam traps, bounce back or get blocked by email providers. In addition, it is an important practice that goes hand in hand with responsible marketing and upholding data quality.

Transactional communication is a vital aspect of any online business, from e-commerce storefronts to app and software services. Invalid or undeliverable emails impact the effectiveness of your email campaigns and decrease your email delivery rate, resulting in costly resends. In some cases, this can even lead to brand damage and lost customer trust.

Why Every Business Needs an Email Verification Database

Invalid or erroneous email addresses occur for many reasons, from inactive domains to temporary and disposable addresses. With regular email list cleaning, you can avoid these types of errors and ensure that your messages are reaching your customers.

An email verification database identifies bad emails and prevents them from being added to your email marketing lists or database. It can be used for bulk email verification of large lists or individual verification for smaller numbers of emails. Typically, an email verifier allows you to submit a list of email addresses as a CSV file for validation. The service then checks each email address for consistency in format and sanitization (e.g. no consecutive dots, allowed special characters in certain positions) and checks for validity based on the SMTP protocol and MX lookup of the domain. Some email verifiers also include a check against known disposable and temporary email domains to reduce the risk of hard bounces.