On Thu, 01 Nov 2012 10:22:13 +0100
Robert Schetterer <rs@...> wrote:
> Am 01.11.2012 09:14, schrieb Ram:
> > On 11/01/2012 11:49 AM, mancyborg@... wrote:
> >> Hi All, first post here, nice to meet you :)
> >> I've been using postfix and dovecot for years but always with few users.
> >> Now i must build a server for 1500 users,
> >> they will use various email software (thunderbird, outlook, ..)
> >> the webmail (i'm not sure if squirrelmail or roundcube)
> >> and blackberry devices (with the BIS service).
> >> There will be around 1000 domains (virtual_domains) and postfix will
> >> read its users and domains from mysql.
> >> I already have the hardware, it is a server with 4 physical cpu (Intel
> >> Xeon E5504 @ 2.00GHz) and 24 gb of ram,
> >> do you think it is enough ?
> > Usually postfix would not be the bottleneck for any mail server. You
> > need to size for dovecot in your case.
> > And sizing would be impossible unless you know how many mails / hr or
> > concurrent imap / pop connections you are going to get.
> > Please size your dovecot server accordingly. The disk i/o will also be
> > very important when you size dovecot.
> > Thank
> > Ram
> > PS: 1500 users with 1000 domains means hardly 2 users per domain ..
> > Are these right numbers ?
> Hi, what you need is some idea of tec about backup, failure safety,
> loadbalancing , cluster storage etc specially on the imap/pop side,
> postfix side mostly is the more easy part in such setups
> and not known for needing heavy hardware or producing bottlenecks
> in short words, you have to think about the whole setup you wanna goal
> not special software like postfix, perhaps you should first look on
> dovecot site and list for examples and hints
> Best Regards
> MfG Robert Schetterer
> [*] sys4 AG
> http://sys4.de, +49 (89) 30 90 46 64
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Hi Ram and Robert thank you very much for your pointers, I'll ask on the dovecot mailing list and do some homework :)
> PS: 1500 users with 1000 domains means hardly 2 users per domain ..
> Are these right numbers ?
yes strange but true, almost each domain has just 1 user.
Regards and have a nice day,