eM Client is a full featured e-mail client with a modern and easy to use interface. eM Client also offers calendar, tasks, contacts and chat.
FairEmail is a privacy-focused email client with a setup wizard that helpfully walks you through the steps to use it with any email provider.
The Bat! is a secure email client software, built to protect your correspondence against third-parties. .
Your one stop mail backup and archiving tool for Mac. Automatically backup mails from Apple Mail, Outlook for Mac, Office 365 for Mac, Thunderbird, Postbox, Gmail, Yahoo and other mail services supporting IMAP and POP service directly on your Mac.
TaxDome is an all-in-one software solution for tax and accounting professionals to manage their practice smarter, faster & more affordably. Includes practice management automation, unlimited e-signatures, document storage, invoicing, website & more.