Best mail client for sierra

The good old days of macOS Sierra!

While there aren't many modern mail clients that support Sierra, here are some popular options that still work well:

  1. Apple Mail: The built-in Mail app is still a great option. It's easy to use, integrates well with other Apple services, and receives regular updates.
  2. Microsoft Outlook: Outlook is a popular choice for many users, and it still works well on Sierra. It offers a clean interface, good search functionality, and integrates well with other Microsoft services.
  3. Thunderbird: Thunderbird is a free, open-source email client that's been around for a long time. It's highly customizable and has a large user base, making it a great option for those who want more control over their email experience.
  4. Postbox: Postbox is a commercial email client that's designed to be fast, secure, and easy to use. It offers a clean interface, good search functionality, and integrates well with other services.
  5. SpamSieve: SpamSieve is a popular spam filtering tool that can be used with any email client. It's highly effective at filtering out spam and offers a lot of customization options.

All of these options are compatible with macOS Sierra, but keep in mind that some may not receive updates as frequently as they would on newer versions of macOS.

If you're looking for a more modern email client, you might consider using a web-based email client like Gmail or Outlook.com, which can be accessed through a web browser. These services often receive more frequent updates and offer more features than traditional desktop email clients.