MassMailer is the best solution to eliminate Salesforce email limitations for sending Mass Emails via mass Email Wizard or Campaigns. You can also Send Mass Stay-in-Touch emails to request updated contact information from the contacts without any Salesforce email limitations.
The simplest, easiest, and fastest way to send mass emails from within Salesforce
Track email statistics - click through, opens, bounces, invalids, etc.
Keep track of which email templates perform better and optimize your emailing.
Choose to send Email Now or Schedule for Later.