Update jails.conf to include IPV6 localhost and external ip to ignoreip line. Update system.sh to include IPV6 address in replacement. See mail-in-a-box#2066 for details.
See [mailinabox issue #2088](https://github.com/mail-in-a-box/mailinabox/issues/2088). This also updates the commit hashes to for anyone updating from NextCloud version 17 (as shown in the related issue) since a different hash is used for tags vs releases.
This was tested and verified to work on a setup previously running v0.44 and then updating to the latest version (v56).
Upstream is adding handling for utf8 domains by creating a domain alias @utf8 -> @idna. I'm deviating from this approach by setting multiple email address (idna and utf8) per user and alias where a domain contains non-ascii characters. The maildrop (mailbox) remains the same - all mail goes to the user's mailbox regardless of which email address was used. This is more in line with how other systems (eg. active directory), handle multiple email addresses for a single user.
# Conflicts:
# README.md
# management/mailconfig.py
# management/templates/index.html
# setup/dns.sh
# setup/mail-users.sh
By not advertising SMTPUTF8 support at the start, senders may opt to transmit recipient internationalized domain names in IDNA form instead, which will be deliverable.
Incoming mail with internationalized domains was probably working prior to our move to Ubuntu 18.04 when postfix's SMTPUTF8 support became enabled by default.
The previous commit is retained because Mail-in-a-Box users might prefer to keep SMTPUTF8 on for outbound mail, if they are not using internationalized domains for email, in which case the previous commit fixes the 'relay access denied' error even if the emails aren't deliverable.
When an email is received by Postfix using SMTPUTF8 and the recipient domain is a Unicode internationalized domain, it was failing to be delivered (bouncing with 'relay access denied') because our users and aliases tables only store ASCII (IDNA) forms of internationalized domains. In this commit, domain maps are added to the auto_aliases table from the Unicode form of each mail domain to its IDNA form, if those forms are different. The Postfix domains query is updated to look at the auto_aliases table now as well, since it is the only table with Unicode forms of the mail domains.
However, mail delivery is still not working since the Dovecot LMTP server does not support SMTPUTF8, and mail still bounces but with an error that SMTPUTF8 is not supported.
They really should never have been conflated with the user-provided aliases.
Update the postfix alias map to query the automatically generated aliases with lowest priority.
And write MIAB dns zone config into /etc/nsd/nsd.conf.d/zones.conf. Delete lingering old zones.conf file.
Co-authored-by: Joshua Tauberer <jt@occams.info>
Port 465 with "implicit" (i.e. always-on) TLS is a more secure approach than port 587 with explicit (i.e. optional and only on with STARTTLS). Although we reject credentials on port 587 without STARTTLS, by that point credentials have already been sent.
downtownallday