The options for Linux email clients are not the best if you’re looking for an application that is elegant and modern. Mailspring is a free and open source email application that is available to download via a snap/flatpack as well as in the AUR. This email client has not always followed the free and open source principles to the full extent. Recently, the project shifted to this including the code that is used in the sync and account features.
In my comments there was some folks that couldn’t use this application because they needed right-to-left compatibilities for their language. Luckily, this was added with a recent release! See the tweet below announce the feature.
The primary reason I love this application is the read receipt feature. When you send off an email from Mailspring it adds tracking features so you can see when the recipient open the emails and click on any links you may have added to an email. Additionally, if someone opens your email multiple times it will let you know with exact timestamps.
To learn more watch the video above or checkout https://getmailspring.com/