I've been using qmail for a couple years, mainly installing it in ISPs. It
has a lot of features. But sometimes, it stops working, without any hint.
And support it's not so easy as other open source projects, specially
because the logs didn't show what is really happening.

I've heard good opinions about Postfix and expect start using it instead of
qmail. But I have some minimum requirements to be able to switch.

My usual setup is:

1) qmail 1.03 without patches
Consequences:
--one unix user for each account
--maildir incredible performance
--pop and smtp in same package
--sendmail command line compatible

2) vpopmail with mysql support
Consequences:
--very easy virtual domains administration
--one unix user for all thousands account users
--all virtual domains are Mysql tables
--all virtual users em Mysql database

3) qmailadmin/autorespond/ezmlm Web Interface
Consequences:
--web admin interface to manage users, forwards, aliases, mailing lists
--web interface for users to change their passwords
--web interface for users to change vacation/forwards
--every domain owner can deal with their accounts

4) IMAP with all above support
-- Very dificult to implement

Except for item 4, I can setup all this using a plain RH 7.x base install,
some RPMs (mysql, gcc, apache, and few others) and items 1-3 compiling from
the tar.gz files, in a couple hours. Ie, no complicated configs,
compilings, etc.

If someone who is using Postfix and was a qmail user and have time to
discuss this, I will appreciate.

I don't want to start a flame war about this. I just want to discuss
technically the previous aspects.

Thanks everyone.
-Gilson

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