Understanding Why Email List Cleaning is Such an Integral Part of Email Validation

OK, so you decided to start sending emails to your customers, leads or prospects, but you just realized that after attempting to upload your list into Mailchimp, SendGrid, ExactTarget, Constant Contact or one of a handful of other ESPs (email service providers), they shut you down before your list was even fully uploaded. WOW, that’s a shocker. Considering that you haven’t sent an email to any of these people ever, or in a very long time, why would this come as a shock? Continue reading