By passing no method to mkpasswd we make it select the strongest cipher
that libxcrypt recommends.
Replaces the example hashes with yescrypt hashes, which is the current
default.
Drop most of the existing certificate handling, because we're effectively
duplicating functionality that NixOS offers for free with better
design, testing and maintainance than what we could provide downstream.
The remaining two options are to reference an
existing `security.acme.certs` configuration through
`mailserver.x509.useACMEHost` or to provide existing key material via
`mailserver.x509.certificateFile` and `mailserver.x509.privateKeyFile`.
Support for automatic creation of self-signed certificates has been
removed, because it is undesirable in public mail setups.
The updated setup guide now displays the recommended configuration that
relies on the NixOS ACME module, but requires further customization to
select a suitable challenge.
Co-Authored-By: Emily <git@emilylange.de>
Postfix with plain DANE only secures domains that configure DNSSEC and
publish TLSA records. With postfix-tlspol we support MTA-STS protected
connections and get caching for its policy results.
Finally, we use this as a stepping stone to build TLSRPT support on top.
instead of just smtp:// with STARTTLS.
Opted to call the flag --ssl and not --tls to keep it consistent with
the module option (mailserver.enableSubmissionSsl), dovecot internals
and smtplib in mail-check.py.
With upcoming changes to the dovecot home and maildirectories we need to
introduce a way to nudge users to inform themselves about manual
migration steps they might need to carry out.
The idea here is to allow us to safely make breaking changes and notify
the user of required migration steps at eval time, so they can make the
necessary changes in time.
Martin Weinelt
emilylange
Guillaume Girol
Antoine Eiche
Naïm Favier
Linus Heckemann
Henri Menke