Email Validation is a method of verifying if an email address is valid and deliverable. It also confirms if an email address has a reliable domain such as Gmail or Yahoo.
Most of the email service providers (ESPs) offer email validation services. You may use lots of free tools to validate email addresses in your list;
The results of these providers will be one of the following:
Valid: The email address exists, and this mail-sending process will be completed to the mailbox level.
Risky: The subscriber exists but there is a risk that this address could result in a bounce. or Invalid: There are syntax errors, DNS errors or mailbox errors.
You need to validate your email list before executing an email marketing campaign because:
Email delivery increases,
Email deliverability improves,
A high sender score is maintained,
Cost per user decreases,
The efficiency of your email program maximizes,
You can have an auto-complete writing feature which allows subscribers to select the appropriate email address type (@gmail, @yahoo.com, @hotmail.com). This reduces the risk of obtaining invalid email addresses with typos.
An email marketing tool like Return Path may be used to receive real-time validation of an email address.