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Apps with 'Self hosted mail' feature
You should have full control over your data. We help you achieve that: a safe home for all your data. Secure, under your control and developed in an open, transparent and trustworthy way. We are Nextcloud. mailcow is a mail server suite based on Dovecot, Postfix, SOGo, Rspamd and other open source software, that provides a modern Web UI for administration. grommunio (formerly known as grammm) efficiently combines all requirements of modern, digital communication and collaboration.