- Features: Update version of roundcube webmail and carddav plugin. This is a security update. ([#1841](https://github.com/Mailu/Mailu/issues/1841))
- Features: Update version of rainloop webmail to 1.16.0. This is a security update. ([#1845](https://github.com/Mailu/Mailu/issues/1845))
- Features: Changed default value of AUTH_RATELIMIT_SUBNET to false. Increased default value of the rate limit in setup utility (AUTH_RATELIMIT) to a higher value. ([#1867](https://github.com/Mailu/Mailu/issues/1867))
- Features: Update jquery used in setup. Set pinned versions in requirements.txt for setup. This is a security update. ([#1880](https://github.com/Mailu/Mailu/issues/1880))
- Bugfixes: Replace PUBLIC_HOSTNAME and PUBLIC_IP in "Received" headers to ensure that no undue spam points are attributed ([#191](https://github.com/Mailu/Mailu/issues/191))
- Bugfixes: Fix letsencrypt access to certbot for the mail-letsencrypt flavour ([#1686](https://github.com/Mailu/Mailu/issues/1686))
- Bugfixes: Fix CVE-2020-25275 and CVE-2020-24386 by using alpine 3.13 for
dovecot which contains a fixed dovecot version. ([#1720](https://github.com/Mailu/Mailu/issues/1720))
- Bugfixes: Antispam service now uses a static hostname. Rspamd history is only retained when the service has a fixed hostname. ([#1837](https://github.com/Mailu/Mailu/issues/1837))
- Bugfixes: Fix a bug preventing colons from being used in passwords when using radicale/webdav. ([#1861](https://github.com/Mailu/Mailu/issues/1861))
- Bugfixes: Remove dot in blueprint name to prevent critical flask startup error in setup. ([#1874](https://github.com/Mailu/Mailu/issues/1874))
- Bugfixes: fix punycode encoding of domain names ([#1891](https://github.com/Mailu/Mailu/issues/1891))
- Improved Documentation: Update fail2ban documentation to use systemd backend instead of filepath for journald ([#1857](https://github.com/Mailu/Mailu/issues/1857))
- Features: Add support for backward-forwarding using SRS ([#328](https://github.com/Mailu/Mailu/issues/328))
- Features: Add options to support different architectures builds ([#985](https://github.com/Mailu/Mailu/issues/985))
- Features: Add support for Traefik v2 certificate dumping ([#1011](https://github.com/Mailu/Mailu/issues/1011))
- Features: Resolve hosts to IPs if only HOST_* is set. If *_ADDRESS is set, leave it unresolved. ([#1113](https://github.com/Mailu/Mailu/issues/1113))
- Features: - Use nginx as http endpoint on kubernetes to simplify ingress ([#1158](https://github.com/Mailu/Mailu/issues/1158))
- Features: Advertise correct mail capabilities through the front-container, this also enables support for PIPELINING in mail-protocols and IMAP IDLE which is a (potential) performance gain. ([#1160](https://github.com/Mailu/Mailu/issues/1160))
- Features: Change default password scheme to PBKDF2 ([#1194](https://github.com/Mailu/Mailu/issues/1194))
- Features: Enable access log of admin service only for log levels of INFO and finer ([#1197](https://github.com/Mailu/Mailu/issues/1197))
- Features: japanese loca is now available ([#1207](https://github.com/Mailu/Mailu/issues/1207))
- Features: Allow to reject virus mails by setting ANTIVITUS_ACTION=reject ([#1259](https://github.com/Mailu/Mailu/issues/1259))
- Features: Update roundcube to 1.4.0 and enable the new elastic skin ([#1267](https://github.com/Mailu/Mailu/issues/1267))
- Features: The roundcube container does support mysql now (no setup integration yet) ([#1268](https://github.com/Mailu/Mailu/issues/1268))
- Features: Added CardDAV-Plugin for webmail roundcube. ([#1298](https://github.com/Mailu/Mailu/issues/1298))
- Features: Allow users to use server-sided full-text-search again by adding the dovecot fts-xapian plugin ([#1320](https://github.com/Mailu/Mailu/issues/1320))
- Features: Relay a domain to a nonstandard SMTP port by adding ":<port_num>" to the remote hostname or IP address. ([#1357](https://github.com/Mailu/Mailu/issues/1357))
- Features: Allow to enforce TLS for outbound mail by setting OUTBOUND_TLS_LEVEL=encrypt for postfix. ([#1478](https://github.com/Mailu/Mailu/issues/1478))
- Features: Introduce option to disable dovecot full-text-search by an enviroment variable. ([#1538](https://github.com/Mailu/Mailu/issues/1538))
- Features: Add support for AUTH LOGIN authentication mechanism for relaying email via smart hosts. ([#1635](https://github.com/Mailu/Mailu/issues/1635))
- Bugfixes: Fix the password encoding upon authentication ([#1139](https://github.com/Mailu/Mailu/issues/1139))
- Bugfixes: Fix piping mail into rspamd when moving from/to junk-folder ([#1177](https://github.com/Mailu/Mailu/issues/1177))
- Bugfixes: Separate HOST_ANTISPAM in HOST_ANTISPAM_MILTER and HOST_ANTISPAM_WEBUI because of different ports ([#1190](https://github.com/Mailu/Mailu/issues/1190))
- Bugfixes: Make postfix mailqueue persistent ([#1208](https://github.com/Mailu/Mailu/issues/1208))
- Bugfixes: Kubernetes manifests updated to be compatible with Kubernetes 1.16 (breaks compatibility with older k8s versions) ([#1241](https://github.com/Mailu/Mailu/issues/1241))
- Bugfixes: Use pip package for radicale to fix failing builds caused by [alpine]upstream package rebuild against different python version ([#1255](https://github.com/Mailu/Mailu/issues/1255))
- Bugfixes: Enable the From header for message delivery report in Roundcube and ensure DKIM Signature ([#1381](https://github.com/Mailu/Mailu/issues/1381))
- Bugfixes: Fix alias resolution in regard to case: A specifically matching alias of wrong case is now preferred over a wildcard alias that might have »eaten« it previously. ([#1387](https://github.com/Mailu/Mailu/issues/1387))
- Bugfixes: Show SPF records in accordance with RFC 7208: Previously we instructed admins to create SPF and TXT records, where only TXT records are correct now. !! Attention !! You need to manually remove the SPF-typed records and keep only TXT in your DNS. ([#1394](https://github.com/Mailu/Mailu/issues/1394))
- Bugfixes: Cover relearning messages when moving bewteen Ham and Spam status ([#1438](https://github.com/Mailu/Mailu/issues/1438))
- Bugfixes: Defining POSTMASTER through setup tool apply also to DMARC_RUA and DMARC_RUF settings ([#1463](https://github.com/Mailu/Mailu/issues/1463))
- Features: Don’t use complicated rsyslogd logging in postfix anymore, instead start the daemon directly — configured to log to stdout. ([#1049](https://github.com/Mailu/Mailu/issues/1049))
- Features: Update alpine to 3.10 and clean up the ensuing problems. ([#1051](https://github.com/Mailu/Mailu/issues/1051))
- Features: Update user password in commandline ([#1066](https://github.com/Mailu/Mailu/issues/1066))
- Features: use HTTP/1.1 for proxyied connections ([#1070](https://github.com/Mailu/Mailu/issues/1070))
- Features: Update Rainloop to 1.13.0 ([#1071](https://github.com/Mailu/Mailu/issues/1071))
- Features: Use python package socrate instead of Mailustart ([#1082](https://github.com/Mailu/Mailu/issues/1082))
- Bugfixes: Use ldez/traefik-certs-dumper in our certificate dumper to have a more robust solution ([#820](https://github.com/Mailu/Mailu/issues/820))
- Bugfixes: Make aliases optionally case-insensitive: After attempting to resolve an alias in its preserved case, also attempt to match it case-insensitively ([#867](https://github.com/Mailu/Mailu/issues/867))
- Feature: Kubernetes support ([#576](https://github.com/Mailu/Mailu/issues/576))
- Feature: Option to bounce or reject email when recipient is unknown ([#583](https://github.com/Mailu/Mailu/issues/583), [#626](https://github.com/Mailu/Mailu/issues/626))
- Feature: implement healthchecks for all containers ([#631](https://github.com/Mailu/Mailu/issues/631))
- Feature: Option to send front logs to journald or syslog ([#584](https://github.com/Mailu/Mailu/issues/584), [#661](https://github.com/Mailu/Mailu/issues/661))
- Feature: Support bcrypt and PBKDF2 ([#647](https://github.com/Mailu/Mailu/issues/647), [#667](https://github.com/Mailu/Mailu/issues/667))
- Enhancement: Expose ports in dockerfiles ([#392](https://github.com/Mailu/Mailu/issues/392))
- Enhancement: Added webmail-imap dependency in docker-compose ([#403](https://github.com/Mailu/Mailu/issues/403))
- Enhancement: Add environment variables to allow running outside of docker-compose ([#429](https://github.com/Mailu/Mailu/issues/429))
- Enhancement: Add original Delivered-To header to received messages ([#433](https://github.com/Mailu/Mailu/issues/433))
- Enhancement: Use HOST_ADMIN in "Forwarding authentication server" ([#436](https://github.com/Mailu/Mailu/issues/436), [#437](https://github.com/Mailu/Mailu/issues/437))
- Enhancement: Use POD_ADDRESS_RANGE for Dovecot ([#448](https://github.com/Mailu/Mailu/issues/448))
- Enhancement: Using configurable filenames for TLS certs ([#468](https://github.com/Mailu/Mailu/issues/468))
- Enhancement: Use PHP 7.2 for rainloop and roundcube ([#606](https://github.com/Mailu/Mailu/issues/606), [#642](https://github.com/Mailu/Mailu/issues/642))
- Enhancement: Add logging at critical places in python start.py scripts. Implement LOG_LEVEL to control verbosity ([#588](https://github.com/Mailu/Mailu/issues/588))