send welcome mail to new users / run one-time-script

piepre

hello,
I want to run a script for new users/mailboxes. I found the plugin dovecot_welcome (https://doc.dovecot.org/2.3/configuration_manual/welcome_plugin/). I added the plugin to /etc/dovecot/mail_plugins with a simple hook-script in data/hooks/dovecot.
The following configuration is in data/conf/dovecot/extra.conf

`welcome {
execute welcome {
args = %{user}
}
wait = yes
}

service welcome {
executable = script /usr/local/bin/welcome.sh
user = dovecot
unix_listener welcome {
user = vmail
}
}`

and the script /usr/local/bin/welcome.sh is bind through a docker-compose.override.yml:
services: dovecot-mailcow: volumes: - ${PWD}/data/bin/welcome.sh:/usr/local/bin/welcome.sh

the script works if I run it inside the dovecot-mailcow container, but the welcome_plugin won’t start the script 🙁

is there another way to run a one-time-script for new users, or does anyone know whats wrong with my settings?

thanks in advance

piepre

ETNyx

Your configuration seem to be for version 2.4. MC currently use 2.3, so no wander you can not get it to work,…

see docs

Also before every update make sure MC does not update to 2.4 it will break your extra configuration.

piepre

Hi ETNyx,
thats correct, but I only posted the wrong extra.conf (did a lot of testing…) 🙁. The current content of my extra.conf is:

``
plugin {
welcome_script = welcome %u
welcome_wait = no
}

service welcome {
executable = script /usr/local/bin/welcome.sh
user = dovecot
unix_listener welcome {
user = vmail
}
}
``
I can see that the unix_listerner runs:
unix 2 [ ACC ] STREAM LISTENING 427368831 114/dovecot /run/dovecot/welcome

ETNyx

If this is whole extra.conf, than go again into docs i send you and read it again, you are missing part

piepre

If you mean mail_plugins = $mail_plugins welcome – mail_plugins is set in dovecot.conf: mail_plugins = </etc/dovecot/mail_plugins
If I try to add the welcome plugin in the extra.conf I get the warning:
dovecot-mailcow-1 | doveconf: Warning: /etc/dovecot/extra.conf line 1: Global setting mail_plugins won't change the setting inside an earlier filter at /etc/dovecot/dovecot.conf line 183 (if this is intentional, avoid this warning by moving the global setting before /etc/dovecot/dovecot.conf line 183)
that’s why I use a hook script to add “welcome” to /etc/dovecot/mail_plugins.
data/hooks/dovecot/enable_welcome:
#!/bin/bash echo -n ' welcome' >> /etc/dovecot/mail_plugins

Now, after I tested it again, I saw that I have to add “welcome” to /etc/dovecot/mail_plugins_imap (set in line 183…)

and tadaa, welcome plugin tries to start my script, which I have to fix, but that is another problem…

dovecot-mailcow-1 | Mar 5 20:59:34 caa3c659b899 dovecot: welcome: Error: /usr/local/bin/welcome.sh: line 26: echo: write error: Broken pipe dovecot-mailcow-1 | Mar 5 20:59:34 caa3c659b899 dovecot: welcome: Fatal: master: service(welcome): child 193 returned error 1

I think the problem solved, thank you 🙂

ETNyx

Great you work it out. Have a fun :-)

piepre

I don’t just send an email via the welcome script, I also create an app_password to make things a little easier for users who log in via SSO.

For anyone who finds this thread because they have the same or similar requirements, I have the configuration files and scripts on GitHub: piepre/mailcow_welcome

ETNyx

Well now I’m confused, so it’s working or no?

If not those logs errors are still valid? My guess you still have that echo pipe problem? So

echo "$mail" | /usr/bin/doveadm save -u "$username"

just dont pipe?

/usr/bin/doveadm save -u "$username" <<< "$mail"

piepre

It’s working with the pipe after I set user = vmail, but you’re right, I could/should use /usr/bin/doveadm save -u "$username" <<< "$mail"