Email and Nextcloud

• Sending sharing links, notifications, etc.

Running Your Own Mail Server (Advanced)

• Postfix, Dovecot, SpamAssassin

• MX, SPF, DKIM, and DMARC setup

Privacy-Focused Alternatives

• Use an external provider like ProtonMail or Tutanota with forwarding

Securing Email

• Encrypting emails (OpenPGP)

• Use of Thunderbird or K-9 Mail with encryption plugins