Am 2009-07-19 04:14:33, schrieb Thomas Goirand:
> Christoph Haas wrote:
> > If the MySQL service becomes unavailable for Postfix then the sending
> > server will get a 4xx temporary error. In a huge setup I'd probably set
> > up monitoring to get noticed of such outages quickly. And I'd use a load
> > balancer in front of two MySQL instances (master-slave replication).
>
> MySQL replication only works with low loads. In fact, running MySQL over
> the network has a HUGE performance penalty.
This is, WHY I use PostgreSQL... It performance miuch better.
Currently I am running a Test-Installation with Courier-Imap-Proxy, two
Courier-Imap-Storage-Server and two PostgreSQL Database and a Webserver.
I am using 6 "Sun Fire X4100M2" with smallest Quad-Core Opteron and
2x2 GByte of memory.
I have 180 Regular-Users on the System and for testing arround 400
foreigners. It handel currently my 4 own and 3 customer domains.
The next step is to install one or two inbound MTA's which do user
customised virus/spam filtering using courierlocalfilter. Unfortunately
I have not seen a postfix/exim setup which is able to do this with
seperated Inbound-MTA, IMAP-Proxy and IMAP-Storage.
This is, what bigger ISP are using but it seems, each one has to hack
its own stuff (Freenet, 1&1/GMX, Arcor, T-Online, KabelBW, ...)
> I filter things like /^dsl.*\..*/, /ppp.*\..*/ and things like that,
> known attachments like file.zip, details.zip and such, known X-Mailer
> like SmartMailer, Avalanche, etc, subject with medecine names
Here you would produce per day more then 2000 False-Positives in my
network.
Spamfiltering MUST be individuual and if you give th user options, like
at <freenet.de>, the user can CHOOSE which he/she want. Global filtering
is VERY dangerous.
And of course, you can not use /^dsl.*\..*/, /ppp.*\..*/ if you have
hosted Domains from your customers, because most customers ARE on such
lines.
> Courier-maildrop sends a (configurable) message in the INBOX whenever
> the mailbox reaches 90%, so it's fine.
Q: I am using the courier-suite too,
but are you able to use Per-User-Quota?
> > Can you compare that to mailman? I haven't used MLMMJ yet.
>
> Oh yes! MLMMJ is lightyears ahead of mailman, that is to me, something
> of the past. MLMMJ is really GREAT, and the dev team doing it very
> friendly as well.
This is NO explanation... What is better?
I use mailman and courier-mlm and both are working perfectly as I expect
> On our system, we do monitor FTP, POP, IMAP, SMTP and web traffic in
> real time, so we can disable some accounts if they abuse.
Which tools do you use?
> Well, I perfectly know how to script things, our panel does all of the
> setup by itself, and there's nothing to be done by hand by the users.
> It's just that it's not really Debian policy compliant, and it cannot be
> sent in a postinst.
Hmmm, there AFAIK several packages in Debian which modify the behabviour
of other packages in Debian, but there is a "debconf" question, which
ASK the administrator, whether the package should take over the
configuration which the administrator should answer [Ny].
Thanks, Greetings and nice Day/Evening
Michelle Konzack
Systemadministrator
Tamay Dogan Network
Debian GNU/Linux Consultant
--
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##################### Debian GNU/Linux Consultant #####################
Michelle Konzack c/o Shared Office KabelBW ICQ #328449886
+49/177/9351947 Blumenstasse 2 MSN LinuxMichi
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