IP-based IMAP access restriction

This is now available from nethserver-testing repo /cc @quality_team

yum --enablerepo=nethserver-testing update nethserver-mail-server

Implemented a new prop, dovecot/RestrictedAccessGroup. The value is a long group name. Members of the given group have IMAP access restricted to trusted networks.

In a next iteration an UI field can be added under Email > Mailboxes tab.

A post was merged into an existing topic: Permits the access of mail/groupware services related protocols only from trusted network

Just thinking out loud:
What if we can use a geo block instead of a single IP address? If a Mailserver is directly connected to the internet, it might be a nice featurew to block all IP addresses that do not come from your country part of the world. If you are in Europe and you could filter out access from Russia, USA, China, etc… just my gut feeling, but it might limit a lot of unwanted traffic.

Sounds like a firewall feature

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