Seo jun won wrote:
>
> Hi?
> First, I'm very thanks to inter7 and Ken Jones.
> Now, I'm using qmail1.03 + CourierIMAP1.1 + vpopmail4.9.4 under the
> RedHat 6.2.
> And I programmed PHP Webmail program.
>
> My immediate work... I have to offer Webmail servier for 300,000 imap
> users. Is possible?
>
> In my plan, My system is consist of some imap, smtp, web server that
> are clusted composition.
>
> Please, tell me advice.
For 300k users I would suggest that you start building your cluster
right away. I suggest following things:
Use MySQL database. If you have to use vpopmail, use it with MySQL. You
need atleast two of them in a active/passive state. The reson for this
is that MySQL (and virtually any other service) likes to die under high
load. If you are using CourierIMAP compile it with authdaemon.
With 300k users you need some serious storage, have you solved that?
For Webmail use something like IMP, where it's easier to scale it up.
SqWebMail is nice, but you need to run a mailserver for each webmail
server - maintainence headache's
Separate SMTP and Storage/IMAP servers. With separate SMTP servers you
can scale that a bit easier, add virus-scanning etc without killing the
rest of your servers/services.
Now, depending how much budget you have for this some (or all) of these
things will happend. For further info pls send me a private email.
And no, these things are _never_ a plug-and-play thing. I know. I am
working with it in my day-to-day job now.
/Mike
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