mlmmj : Mailing List

While there are hundreds of social networks, with their own policies and ads, instant messenging apps, forums and so on, remember mailing lists are a thing. Mailing lists are the future because :

Here, we'll talk about mlmmj since it perform well on OpenBSD, is easy and secured.

mlmmj website

install mlmmj

# pkg_add mlmmj

Create a new mailing list

Use command "mlmmj-make-ml" and follow instructions.

Below is an example to create list "pizza" on the domain "list.athome.tld", so "pizza@list.athome.tld".

# mlmmj-make-ml
Creating Directorys below /var/spool/mlmmj. Use '-s spooldir' to change
What should the name of the Mailinglist be? [mlmmj-test] : pizza
The Domain for the List? [] : athome.tld
The emailaddress of the list owner? [postmaster] : batman@athome.tld
For the list texts you can choose between the following languages or
give a absolute path to a directory containing the texts.
Available languages:
ast   cs    de    en    fi    fr    gr    it    pt    sk    zh-cn
The path to texts for the list? [en] :
Don't forget to add this to /etc/aliases:
pizza:  "|/usr/local/bin/mlmmj-receive -L /var/spool/mlmmj/pizza/"
If you're not starting mlmmj-maintd in daemon mode,
don't forget to add this to your crontab:
0 */2 * * * "/usr/local/bin/mlmmj-maintd -F -L /var/spool/mlmmj/pizza/"
 ** FINAL NOTES **
1) The mailinglist directory have to be owned by the user running the
mailserver (i.e. starting the binaries to work the list)
2) Run newaliases

Make sure permissions are correct:

# chown -R _smtpd:_smtpd /var/spool/mlmmj/pizza

Edit root's crontab ("# cronta -e") to add the line given by mlmmj-make-ml :

0 */2 * * *  /usr/bin/mlmmj-maintd -F -L /var/spool/mlmmj/pizza

Make smtpd ready

Edit "/etc/mail/smtpd.conf" so it handles mailing list messages correctly :

table aliases "/etc/mail/aliases"
[...]
action local_mail maildir alias <aliases>
[...]
match from any for domain "list.athome.tld" action local_mail

It is important that action ("local_mail" here) handle aliases.

That's why you must edit "/etc/mail/aliases" to send to mlmmj incoming messages for the mailing list:

pizza:"|/usr/local/bin/mlmmj-receive -L /var/spool/mlmmj/pizza/"

End with "newaliases" command or restart smtpd.

Customize a list

You can customize a list by editing the files in "/var/spool/mlmmj/pizza/control".

If files don't exist, just create them.

You can filter incoming messages depending on the sender, force plaintext, use custom text in templates, modify headers to keep users privacy and much more.

Look at the official documentation to learn more