This is the list of validations we shall perform;
- Valid format: First, we validate the format of the email address is correct and looks something like email@provider.com.
- Gibberish Email Address: We check to ensure the address doesn’t look like a random email address. For example, 1e49cs1pb6@company.com doesn’t pass the test.
- Disposable Email Address: We check if the email address has a domain name used for temporary email addresses.
- Webmail Email Addresses: We verify if the email address uses a webmail like Gmail or Yahoo.
- Presence of MX Records: We check if there are MX records on the domain. If there aren’t, the email address can’t receive emails.
- Presence of SMTP Server: This check is successful if we are able to connect to the SMTP server (indicated in MX records).
- SMTP Check: We test the email address and see if it bounces or not, without sending an email.
- Accept-all Domain: We check if the server has a catch-all policy that accepts all email addresses.
