I have recently gone through an informative article that explains the two best approaches to add ProtonMail to Apple Mail. In this respect, you can accomplish this task using a manual and a professional software approach. Through this article, you will find out why most of the mac users prefer Apple Mail over ProtonMail. However, you need to install the ProtonMail Bridge App to perform this task manually. Don't worry, this article will elaborate on detailed steps that will help you to accomplish this task. It is subdivided into 2 stages.

• Setup Protonmail on Apple Mail using Proton Mail Bridge App
• Disable Apple Mail’s Junk Mail Filtering Option

Apart from this, you can also perform this task with the help[ of a secure IMAP Backup Tool. this advanced utility enables you to back up IMAP emails locally in various file formats such as PST, MBOX, PDF, CSV, MSG, EML, etc. Also, you can directly migrate the emails of IMAP-enabled email clients to other popular email services including, Gmail, Thunderbird, Office 365, AOL, Zoho, etc. if you want to analyze its performance then you can try its free demo version.