Basic Dovecot/Postfix in Ubuntu

Configuring mail system is annoying. There are quite a bit different components which must be configured to work together.

My main choice for mail system is dovecot/postfix. As I don’t really understand how all this thing goes, I may have missed or misunderstood some parts. Or most of them. Feel free to correct this post.

For starter, most of basic configurations for Postfix and Dovecot has already been done by Ubuntu (or Debian) default configuration which includes enabling IMAP and TLS.


LDA (or MDA) delivers received mails to correct user and location. I let dovecot handle this thing because it’s easier this way. In /etc/postfix/

mailbox_command = /usr/lib/dovecot/dovecot-lda -f "$SENDER" -a "$RECIPIENT"

Source ]

And that’s about it.


The Mailbox format. The alternatives are mbox (ancient, shouldn’t be used anymore, I believe), or dbox (Dovecot only), or some other formats (which I don’t really care about). So basically I go with Maildir.


mail_location = maildir:~/Maildir

[ Source ]


The last one, Postfix authentication. I use Dovecot SASL because it’s easier.


smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination


unix_listener /var/spool/postfix/private/auth {
  mode = 0666

[ Source ]

For Dovecot config, it’s usually already in there, one just uncomment it to enable.

Restart Dovecot and Postfix, and that’s it. As I mentioned before, Ubuntu has preconfigured many things which leaves me only few additional tasks to be done to enable simple mail system (with TLS, IMAP, and whatnot).

Protip: use Google Apps or Live Domain instead of managing your own mail server.

Disabling Upstart Service in Ubuntu (11.04+)

Took me few weeks to find out that this one-liner does wonder:

echo manual >> /etc/init/mysql.override

(the line above is to disable mysql, obviously. And must be done as root)

The answer is on first hit (as of this post’s writing) of googling “ubuntu disable service” but you need to scroll down a bit and ignore shitload of crappy, outdated explanations to find that small gem.

Unfortunately doesn’t apply to previous LTS. Or does it?

Moebooru/Rails 3, and more

After working on it for several weeks, finally it got to the point where it’s relatively usable. No more Bundler-on-Rails2 evilry and the fact that 3.0 branch is still supported.

The best part is the one above. Yes, Moebooru now runs on Rubinius/Puma. The only foreseeable problem is it uses on file uploads which, when several people uploading (or working with) files at same time, the temporary filename will collide.

Though due to me aiming more for workable implementation instead of correct implementation, there are quite a lot legacy stuff still in there:

  • repeated_auto_complete doesn’t work in Rails 3 without vendoring or updating the gem itself  (and I did both since Bundler’s git functionality seems broken in Rubinius).
  • prototype_legacy_helper must be used since I haven’t had time to upgrade the *_remote functions (and still thinking how to do it).
  • verification gem since I haven’t upgraded the route and its functionality, which previously built-in in Rails 2.3 has now removed.
  • Unsightly lib/core_ext. Just look at evilry I have added to make it behave like 2.3-stable.

On the brighter side, now I can start cleaning up the code. Or upgrade all the way to Rails 3.2 ( ¬‿¬)