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The email service is running on a linux machine and uses postfix and dovecot together with rspamd.
The storage which holds the emails is encrypted and all connections via pop3, imap or smtp needs to be TLS 1.2 encrypted.
It's possible to access the mailservice via Webmailer or any device or software which is able to use smtp, imap and pop3.
Common Mailing Software:
Mobile:
Overview: