You can find this out by starting up the application Netinfo Manager which you can find in the Applications/Utilities folder. Start it up and you see the panel as shown in the image below.

Click on users and then in the next panel click on postfix, in the panel below you will see all the information for that user. With this method you see in the bottom panel the UID and the GID for the postfix user. On the systems I have it was always 27 but I do not know if this is always the case.

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First downloading the source code as I couldn’t find any ready made packages I could just install. You can get Courier IMAP from here and the authentication library from here. I used version 4.0.6 of the IMAP server and version 0.57 of the authlib daemon.

The authlib daemon was as easy as ./configure, make and then as root do a ‘make install’ and ‘make install-configure’ and then tweak some of the configuration files. The IMAP server took more effort. It needed some parameters during the configuration stage, I took some values on a best guess effort but I still need to find out what they do exactly. I’ve got it compiled and running with:

./configure --prefix=/usr/local --with-authpwd=YES  --without-authcram
make
make install

Now I can read my emails from the server, still needed some configuration tweaking but more on that later. Still while trying to send mail to myself the mail address gets bounced in Postfix, I need to find out why. But to end on a positive note, my mail was copied into the send mail folder on the IMAP server !

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By the way this is just a quick write down on the things I found out, it’s not a complete guide. I’m planning to write a step by step guide on how to compile and configure a proper Postfix mail server on your Mac mini.

Via some backdoor (can’t remember how I found it) located this article on AFP548.com. It’s for an older version of Postfix and OS X (panther) but it’s got some nice pointers on the stuff you have to do. You have to remember that I’m not an Unix guru and just have fumbled my own current Postfix installation into a working environment. This time it’s going to be a repeatable effort and I’m looking for all the info I can get.

I’m including PCRE into the Postfix build as well as it’s faster than regexp for contect filtering. I’m not sure if I’m going to use this but it was quite easy to do. It was as simple as downloading the source from http://www.pcre.org/, extracting, running ./configure, make and make install. Done.

Installing SASL was a bit more complex because of the compiler errors I got when trying to compile the latest release. But to cut a long story short, I got it compiled when using version 2.1.18 of the source. I’ve still got to find out which is the latest version that compiles without a problem.

Compiling Postfix was also not nuch of a problem. Just getting the latest version of the source (2.2.5 in this case) and getting the first make command working with the options needed. We wanted MySQL support (what all this effort was about) and include PCRE ad SASL. So you end up with a command looking like:

make -f Makefile.init makefiles \
CCARGS='-DUSE_SASL_AUTH -I/usr/local/include/sasl \
-DHAS_MYSQL -I/Library/Mysql/include/mysql'  \
AUXLIBS='-L/usr/lib -lldap -L/usr/lib -llber -L/usr/lib -lsasl2 \
-L/Library/MySQL/lib/mysql -lmysqlclient -lz -lm'

I’m using the Server Logistics package for MySQL (as told here), if you are sing a package from a different source your path to the mysql.h file might be different. Please check it before compiling.

If the above make command worked for you then issue it, followed by a make and make update command and everything should be up to date and installed. To check if we got MySQL tables in this version run the following command and look for MySQL in the output:

# postconf -m
btree
cidr
environ
hash
mysql
pcre
proxy
regexp
static
unix

Next step is the IMAP server and configuration but that is for another time, now I’m happy I got this done. Just taking one step at a time.

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I found this out while having a talk with Bernard Teo from CutEdgeSystems.com on if the postfix enabler supported virtual domains. Bernard was and is one of the fastest email responders I ever encountered when asking support on a piece of software, he responded within 5 minutes. He explained that, despite claims in several forums that it wouldn’t work, I could configure virtual domains with the Postfix enabler as long as each user on each domain had a seperate mailbox and that was not what I was looking for. I want mailboxes for as many users as it takes while having just one user enabled on my Mac. It’s going to be a web server for many small domains and I want to be able to handle the e-mail traffic for all those domains with a minimum of hassle like I have on my current Debian servers.

I now will start looking for the best place to get the source code for Postfix with installation and configuration help. I guess that now I’m going to compile it I will use all the other features I wanted to use from the beginning like MySQL support and for the Courier IMAP server , which in turn would mean that I can provide web based email services using SquirrelMail.

Wish me luck…

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postfix/pickup[11145]: fatal: unsupported dictionary type: mysql

I started googling the error message and to find out how I could see which kind of lookup tables are support in the default package installed in OS X. The command I found and used was:

postconf -m

The result was that the following tables are supported:

static
sdbm
cidr
regexp
environ
proxy
btree
unix
hash

Next I will start the configuration process again from scratch to see if I can get it all working via configuration files. I hope I can get the IMAP folders working, I thought that was supported.

I can off course get the sourcecode for Postfix and recompile the whole thing to get everything working as I wanted (with MySQL support for instance) but I really would like to use standard software and not go out and compile everything myself. If someone knows of a standard package I can install like the packages for Apache, MySQL and PHP please let me know !

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There are a lot of HowTo’s and FAQ files to be found on the internet, each for a specific configuration and a specific operating system. Just have a look at postfix.org’s document section to see some of the “official” ones. There are more just google for them.

I tried to collect some information on using and configuring Postfix on OS X but it is hard to come by. When asking around I got pointed to the Postfix Enabler which is a great solution if you’d want a simpel server with one domain, but as far as I could see it doesn’t work if you’d want to setup multiple domains.

Others suggested to install OS X server, it’s got the same basic software installed, but it comes with nice GUI based tools for configuring it all. A shame they can’t be downloaded somewhere. I’m not going to go the server route, not on my Mac mini, maybe later on a true Xserver.

I’m now even more determined to get it working on the Mac just the way I want it done. I’ve got most sites covering this bookmarked to keep googling to a minimum. I’m going to document as much as possible and put it on this site so others can benefit from my expirience doing this. I hope it will help others to get it running in a shorter time frame than I will.

Keep coming back for more info on the subject. I will publish any progress I make.

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More information on how this works and how to configure Apache can be found here. That is not what this blog entry was about.

Looking for the httpd.conf file where you configure your Apache webserver I found 2 entries in the filesystem. One was in /etc/httpd/ where you’d expect it as a regular Linux/Unix user but there is also one to be found in /private/etc/httpd/. So which was I to use ?

After some Googling and looking closer at the directory entries, I found out that /etc is a symbolic link to /private/etc and therefore the same directory. So actually there is only one httpd.conf that is used.

It seems that this has been done to provide compatibility between the unix roots and the OSX’s own layout of the filesystem which has its origin in NeXT.

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• Put the terminal in the dock
• Click and hold the left mouse button on the terminal icon




• In the menu that appears, click on the “Connect to server…” option



• A small window appears where you can manage your SSH connections and connect to any server with a mouseclick, just like I used to do with Putty.

I hope you like this solution as much as I do, if you have another good solution for this leave a comment.

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