Dovecot vpopmail-auth driver removal. Migrating to the SQL driver

January 18, 2021 Roberto Puzzanghera 20 comments

Those who are still using the Dovecot's vpopmail auth driver should consider a migration to the sql driver, as on January 4, 2021 dovecot-2.3.13 was released and the vpopmail auth driver removed (more info here).

• Jan 18, 2021
  - now everything is inside a vpopmail patch. The aliasdomain sql records will be created/deleted transparently when using vaddaliasdomain/vdeldomain in the usual way, provided that you have created the aliasdomains dbtable
• Jan 17, 2021
  - I modified the dovecot's sql query so that a pair real_domain/real_domain is not needed anymore in the dbtable
• Jan 13, 2021
  - added support for sql aliasdomains

Adding vpopmail's aliasdomains to mysql

As some commentators have already pointed out, switching to dovecot's sql auth can be painful if one have domain aliases. I will show below how to make dovecot aware of the vpopmail's aliasdomains, so that a user who tries to login with a domain alias can pass the authentication.

The idea is to save the pairs alias/domain in a new "aliasdomains" dbtable and modify the dovecot's sql query in order to select the user's domain from this table in case the domain is an alias or from the vpopmail table otherwise. A vpopmail sql-aliasdomains patch will transparently do the sql stuff when creating/deleting the alias in the usual way by means of the vaddaliasdomain/vdeldomain vpopmail's programs.

NB: if you are testing this solution, I would be glad if you give me a feedback by means of a comment below, so that I can speed up its introduction in the installation guide.

Patching qmail

December 4, 2020 Roberto Puzzanghera 289 comments

• Latest stable combined patch for netqmail-1.06 v. 2020.12.04 (MD5)

Changelog

The complete changelog and patch info are inside the README.PATCH file.

• 2020.12.04
  received.c: some adjustments to compile with gcc-10 (diff here)
• 2020.07.29
  -dk-filter: corrected a bug where dk-filter was using DKIMDOMAIN unconditionally. Now it uses DKIMDOMAIN only if _SENDER is null (tx Manvendra Bhangui).
• 2020.07.27
  -added a fix for CVE-2005-2513 (tx C)
• 2020.04.25
  -qmail-smtpd.c: added rcptcount = 0; in smtp_rset function to prevent the maxrcpto error if control/maxrcpt limit has been exceeded in multiple messages sent sequentially rather than in a single mail (tx Alexandre Fonceca)
• 2020.04.16
  -qmail-remote-logging patch added (more info here)
• 2020.04.10
  -DKIM patch updated to v. 1.28
  * outgoing messages from null sender ("<>") will be signed as well with the domain in env variable DKIMDOMAIN
  * declaring NODK env variable disables old domainkeys signature, while defining NODKIM disables DKIM.
• 2020.01.11
  -qmail-tls patch updated to v. 20200107
  * working client cert authentication with TLSv1.3
• 2019.12.08
  -BUG qmail-smtpd.c: now TLS is defined before chkuser.h call, to avoid errors on closing the db connection (tx ChangHo.Na)
• 2019.08.07
  - a couple of adjustments to chkuser (tx Luca Franceschini, more info here)
  * BUG - since any other definition of starting_string ends up as "DOMAIN", if starting_string is otherwise defined, chkuser will be turned off.
  * CHKUSER_ENABLE_ALIAS_DEFAULT, CHKUSER_VAUTH_OPEN_CALL and CHKUSER_DISABLE_VARIABLE are now defined in chkuser_settings.h
  * Now CHKUSER_DISABLE_VARIABLE, CHKUSER_SENDER_NOCHECK_VARIABLE, CHKUSER_SENDER_FORMAT_NOCHECK, CHKUSER_RCPT_FORMAT_NOCHECK and CHKUSER_RCPT_MX_NOCHECK can be defined at runtime level as well.
• 2019.07.12
  - qmail-channels patch added
  more info here http://www.thesmbexchange.com/eng/qmail-channels_patch.html
  - improved verbosity of die_read function in qmail-smtpd.c (qmail-smtpd: read failure). More info here

Installing and configuring Spamassassin

November 18, 2020 Roberto Puzzanghera 25 comments

• Info: http://spamassassin.apache.org/
• Docs: http://spamassassin.apache.org/full/3.4.x/doc/
• Latest version: 3.4.4
• Download: http://spamassassin.apache.org/downloads.cgi

SpamAssassin is a mature, widely-deployed open source project that serves as a mail filter to identify Spam. SpamAssassin uses a variety of mechanisms including header and text analysis, Bayesian filtering, DNS blocklists, and collaborative filtering databases. SpamAssassin runs on a server, and filters spam before it reaches your mailbox.

Changelog

• Nov 18 2020
  - solved some priviledge problems with the reports of the RC's markasjunk plugin, which is going to write inside the log dir and read the razor's identity file.
  - moved all log files into /var/log/spamassassin (apache group now has +w priv). spamdctl and logrotate scripts modified accordingly
• Jul 15 2020
  - added Razor2, Pyzor and Spamcop configuration (thanks to Gabriel Torres for the hint).

Adding clamav-unofficial-sigs

October 30, 2020 Roberto Puzzanghera 0 comments

• More info here

The clamav-unofficial-sigs script provides a simple way to download, test, and update third-party signature databases provided by Sanesecurity, FOXHOLE, OITC, Scamnailer, BOFHLAND, CRDF, Porcupine, Securiteinfo, MalwarePatrol, Yara-Rules Project, urlhaus, etc. The script will also generate and install cron, logrotate, and man files.

Running OpenBoard in a window

October 24, 2020 Roberto Puzzanghera 0 comments

• OpenBoard home page
• Download the patch
• Github discussion
• Willy Sudiarto's SlackBuild (for Slackware users)

These days I'm forced again to do lessons from remote. My school asked me to refer to Google Meet for the videoconferences and one thing I disliked was the Jam interactive whiteboard, which is completely inadequate for scientific subjects. On the other hand OpenBoard, my favourite board tool that I successfully use with Zoom, seemed not to be recognized as an application to be shared, because it runs fullscreen.

After some googleing I found a patch from this guy (I big thank for his work!) which forces OpenBoard to run in a window, but at the cost of passing a variable at compilation time. I modified the logic of that patch so that a user can set how OpenBoard will run just modifying a configuration option. The "run in a window" feature is disabled by default, so it will not bother those teachers who are already familiar with the interface, but it can be easily switched on by advanced users.

qmailadmin

September 1, 2020 Roberto Puzzanghera 62 comments

• Author:  Inter7
• Version: 1.2.16
• Download the sources from  http://sourceforge.net/projects/qmailadmin/files/
• Combined patch v. 20200902

qmailAdmin is a free software package that provides a web interface for managing a qmail system with virtual domains. It provides admin for adding/deleting users, Aliases, Forwards, Mailing lists and Autoresponders.

Combined patch details

• qmailadmin-skin, a patch that I created during covid-19 spare time, provides a new responsive skin to the control panel. It modifies everything under the html dir and many .c files in order to adjust the html embedded into the source files. Added a stylesheet style.css in the images folder and a couple of png files for the qmail logo.
• patch to call cracklib in order to check for the password strenght. This should avoid unsafe accounts created by domain administrators such as "test 123456".
• A patch (thanks to Tony, original author unknown) which gets qmailadmin to have authentication failures logged. This makes possibile to ban malicious IPs via fail2ban. It is required to create the log file /var/log/qma-auth.log initially and assign write priviledges to apache.
• ezmlm-idx 7 compatibility patch (author unknown), which restores the compatibility with ezmlm-idx-7 (thanks to J.D. Trolinger for the advice).
• a fix to the catchall account (thanks to Luca Franceschini).
• another fix to autorespond.c to correct the way .qmail files are modified

Changelog

• 2020.09.02
  -mod_user.html: cleaned the html as it was printing unneeded strings
• 2020.08.10
  - mod_user.html: added the "value" attribute to the name/gecos input tag
  - Makefile.in: added a line to install the css, as already done for Makefile.am
  (tx Pablo Murillo)
• 2020.05.22
  - mod_user.html: removed the "required" attribute on password field, to allow modifications in case of no password change

 

simscan

August 4, 2020 Roberto Puzzanghera 50 comments

• Info: https://github.com/qmail/simscan/releases
• John Simpson's simscan page (patch and a lot of info)
• README
• Download (local copy)
• Combined patch used
• Version: simscan-1.4.1
• Old 1.4.0 repo: http://sourceforge.net/projects/simscan/files/

Simscan is a simple program that enables the qmail smtpd service to reject viruses, spam, and block attachments during the SMTP conversation so the processing load on the email system is kept to a minimum.

Combined patch details

Version 1.4.1 is a fork of the original simscan by Inter7. The sources have been polished and modernized a bit and contain a number of bug fixes and patches, including almost all the patches by jms (the only missing one is the "debug" patch which we will apply below) and the bug fix by Gustavo Castro that I had in my previous bundle of patches. Therefore the new patch simply adds the following:

• the jms "debug" patch, to improve the debugging of simscan on qmail-smtpd log;
• a bug fix by Bob Greco where a received message with multiple 'local' recipients executes spamc as null user and not as the user extracted from the first local recipient.

Roundcube plugins

July 16, 2020 Roberto Puzzanghera 24 comments

UPDATE as of Jul 15: markasjunk plugin has now info about the cmd_learn and multi_driver drivers

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• Official repository: http://plugins.roundcube.net/

My enabled plugins are (at the moment):

• password, which is already included in the plugins folder
• managesieve, which writes sieve scripts to filter the incoming mails (reject, move to specific folders etc.). Note that in order to use it you must have Dovecot managesieve enabled.
• SpamAssassin-User-Prefs-SQL, which writes the spamassassin user preferences in the DB. The user will be allowed to create a black/white list, to adjust the required_score and so on.
• markasjunk. You can add the sender's email address to the blacklist, or run a command such as sa_learn. Requires sauprefs.
• rcguard. This plugin logs failed login attempts and requires users to go through a reCAPTCHA verification process when the number of failed attempts go too high.
• Context Menu. Adds context menus to the message list, folder list and address book. Menu includes the abilities mark messages as read/unread, delete, reply and forward.
• autologon. Autologin from external Site e.g. (CMS, Portal ...)
• logout_redirect. Modified version to only redirect to the homepage (depending on the domain part of the default identity)
• newmail_notifier. can notify new mail focusing browser window and changing favicon, playing a sound and  displaying desktop notification (using webkitNotifications feature).
• carddav. CardDav client. You can sync your addressbook against a CardDav server like nextcloud or SoGO.
• enigma adds support for viewing and sending of signed and encrypted messages in PGP (RFC 2440) and PGP/MIME (RFC 3156) format