IncrediMail is not available for Mac but there are plenty of alternatives that runs on macOS with similar functionality. The best Mac alternative is Thunderbird, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to IncrediMail and 18 are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to IncrediMail are Microsoft Office Outlook (Paid), eM Client (Freemium), Apple Mail (Free) and Spark (Freemium).
Zoho Mail is a webmail service built with the needs of a modern business in mind. It provides features for business users to communicate effectively while catering to the customization and mailbox management needs of IT administrators.
Postbox is an email application that helps you organize your work life and get stuff done. It has all the elegance and simplicity of Apple Mail, but with more power and flexibility to manage even the most demanding workloads.
TypeApp is an all-free, beautifully designed, universal email app, capable of managing unlimited number of mail accounts from various providers, allowing for smart push notifications while enabling personalization across multiple email accounts.