Dear friends

Simon Powell cabletastic at gmail.com
Tue Nov 13 15:53:22 CET 2007


If properly configured and on the correct hardware it should be fine.  
Postfix is very scalable and most importantly reliable.

On 13 Nov 2007, at 14:45, rajnish kumar wrote:

> I have some confusion about postfix performance, if I am an ISP and
> with 20,000 user's with postfix, Is postfix  is capable to do this
> pretty things. Has any one has experiance to working with postfix in
> heavy load
>
> with redgs
> rajnish
>
>
> we have some discussion with Mr Alain Spineux
>
> me: should we ask some ?
> Sent at 7:48 PM on Tuesday
> Alain: some what ?
> me: thnx
> regarding postfix
> i want to established a MTA with 20000 user's shoud i go with postfix
> Alain: What else ? [nose smile]
> me: qmail
> Sent at 7:52 PM on Tuesday
> Alain: Qmail was probably a good peace of sofware in 2000 and before.
> But it's no more developped since (I things)
> Sent at 7:54 PM on Tuesday
> Alain: postfix is actively maintained by Wietse and actively
> supported on the mailing list ! Very actively supported !
> Postfix is also a good piece of software.
> me: that's good, would you think that postfix is capable to bear load
> of 20000 usre's with heavy load
> Sent at 7:57 PM on Tuesday
> Alain: Yes ! (But I dont have experience with so much users).
> Sent at 7:59 PM on Tuesday
> Alain: You will probably use other component "weaker" than postfix,
> AV, imap server ... Or is it a SMTP relay only ?
> me: yes i am using kolab2 right now but only with 1500 usre's but  
> it's too slow
> Sent at 8:01 PM on Tuesday
> Alain: But postfix is not the bottleneck, AV and SPAM checking are
> very CPU and IO consuming ! Then cyrus, if using IMAP is probably
> using more load than postfix !
> Sent at 8:04 PM on Tuesday
> Alain: Also kolabd can use some CPU when checking all LDAP entry
> (depending the kolab2, 2.0 or 2.1 ) also  lot of PHP script are used
> by postfix, in kolabfilter, policies, ...
> me: AS per i know kolab is not working in distributed enviroment if
> it works then still mails not send locally means directly one server
> to another. because kolab does't have fearure of mailHost
> or you are right
> yes you are right
> Sent at 8:08 PM on Tuesday
> me: if you don't mind could i send this query in <kolab-users at kolab.org 
> >,
> Sent at 8:10 PM on Tuesday
> Alain: Kolab dont need distributed features in itself, all kolab
> component can be distributed on different server : postfix, cyrus,
> ldap, amavis can all be on a different server. You can have multiple
> instances of each of them . Also ldap and cyrus have some replication
> feature to help to distribute the load on multiple server !(but
> leaving a little more the kolab integration)
> Yes publish the all discussion
>
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