Review of Nextcloud Mail powered by the Slant community.
Easy to use email client which connects to your mail server via IMAP and SMTP.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Open-source, self-hosted, connects to major servers (Gmail, Outlook, etc)
Pro Maintained by the Nextcloud organization
Cons
Con Not perfectly stable yet
Still in development, no 1.x release. Random hickups / crashes that require reloading the page.