1. Can a "valid" email address bounce?
The verifications are never too sure, but we can guarantee almost 95% of "valid" email addresses won't bounce at all.
2. Does it send an email to the lead to do the verification?
The email checker does the validation without sending an email to the lead, but by directly connecting to the SMTP server.
3. What do you check for in email addresses when verifying emails?
This is the pointers of the verifications we perform to find out if it’s verified or not:
Valid format: First, we verify the format of the email address and looks something like "email@example.com".
Gibberish Email Address: We check to ensure that the address doesn't look like a random email address. For example, firstname.lastname@example.org doesn't qualified to pass the test.
Disposable Email Address: We check if the email address has a domain name under it used for temporary email addresses.
Webmail Email Addresses: We verify if the email address uses online webmail
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 to the host.
Accept-all Domain: We check if the server has a catch-all policy which accepts all the email addresses.