postfix vs. qmail?

[Khanh Cao Van]

What about postfix vs Courier Mail Server ???




On 6/30/05, Ted Mittelstaedt <tedm at toybox.placo.com> wrote:
> 
> 
> >-----Original Message-----
> >From: owner-freebsd-questions at freebsd.org
> >[mailto:owner-freebsd-questions at freebsd.org]On Behalf Of MikeM
> >Sent: Wednesday, June 29, 2005 6:13 AM
> >To: freebsd-questions at freebsd.org
> >Subject: Re: postfix vs. qmail?
> >
> >
> >On 6/29/2005 at 8:48 AM brian.barto at spectrum-health.org wrote:
> >
> >|For one who wants to host email accounts for multiple domains, which
> >is
> >|better? I've started installing and configuring qmail according to the
> >|tutorial on qmailrocks.org but i'm wondering if i should stop and
> >consider
> >|postfix before pressing on.
> > =============
> >
> >I started using qmail but eventually switched to Postfix.  I found that
> >qmail required several [conflicting] patches to get the feature level I
> >wanted.  I also did not like the need to move my box towards what djb
> >thought a *nix box should be set up.  Postfix seems to want to just
> >drop in to a standard environment.   But the items that really made the
> >choice easy for me are that the Postfix mailing list is excellent, and
> >that Postfix development is still alive.
> >
> >I host multiple virtual domains with Postfix (and Courier-IMAP for the
> >pop3 amd imap support).
> >
> >
> 
> We use uw-imap and sendmail and host many thousands of mailboxes.  One
> of the issues with the maildir format that postfix and courier-imap
> use is that it requires more disk writes for each piece of mail your
> running through a mailbox.  Obviously, like many technical issues, you
> can throw money at the problem (in hardware investment) and it will
> go away. :-)
> 
> One other thing you should consider if your really intending on
> setting up multiple domains and charging money for them (as opposed
> to just doinking with a mailserver in your home) is going to a
> three-mailserver setup.  Use one mailserver specifically for receiving
> and sending mail from the Internet proper, use one for the user
> mailboxes and user SMTP, and use one for the webinterface.
> 
> The reason for this is that you really need to run spam and virus
> scanning on the mailserver that is published as the SMTP server
> for your domains, and you will find that for every 1 piece of
> legitimate mail that you receive from the Internet
> and deliver to your users mailbox, you will get 9 others that are
> spam or viruses or junk.  Because of the AV and spam scanning, this
> server is also the most prone to taking a dump.  When it goes
> offline, you don't want all your users calling you and screaming
> when their mail clients all start spitting errors back to them.
> 
> You also want the webinterface separate because of the simple reason
> that the best webinterfaces are the most complex, because they
> do the most for the user.  Sure, you can field a simple webinterface
> like Open Webmail, but this is pretty bare-bones compared to
> somethng like Horde/IMP  And while Horde/IMP is a long, bitchy,
> involved and complex setup, if you do it right your users will
> love it, and will most likely come to utterly depend on it for
> handling mail and scheduling.  This is what you really want, the name
> of the game here is customer retention, and you want to make it
> easy for customers to get entangled with your systems and difficult
> for them to get out.  And the best way to do this is to offer them
> a schmorgasboard of things to choose from.  A stripped down webinterface
> is simple to setup and administer, but it is also very easy for a
> customer to walk away from.  By contrast an interface that will
> do everything for them, is difficult to walk away from once they
> start depending on it doing everything for them! :-)  Why do you
> think AOL still has millions of customers while charging double the
> going rate for dialup?
> 
> Ted
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> 


-- 
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Cao Van Khanh