On 09/01/02 09:55 +0530, LINUX wrote:
> Dear friends
> 
> I have a compaq server ML370  intel architexture PIII 1.13 Ghz Dual CPU .
> 786 MB ram , 2 *36 GB SCSI HDD
Those disks are *too* big for any reasonable amount of email.
Replace those with 4*18GB disks for higher performance.
 
> I am looking to set up an email server which would cater to approximately
> 3500 users located in 40 locations accross the country.The no of users can
> go up to 4000 at the most in next 2 years .
If youy disk can handle this, your box can do a lot more.

> I have Suse Linux Email II software which i would like to use as my main
> gateway server. I want to provide my users with web mail also this is also
> available in suse mail server software.
Hmmm, IIRC, this is postfix+cyrus
 
> My querries are :
> 1. Will the harddisk be enough for such sort of set up and i also intend to
> keep RAID 1 in the HDD So effectively i would have only 36 GB HDD working
> space .
Split across more spindles, postfix need very fast disks. though I don't
think you will be stressing your mailserver at all.
 
> 2. My remote branches  would be picking the mail from the server and
> distributing them locally . I want a simple set up at the branches so that
> it is not a regular headache for the central admin to monitor the servers at
> branches.Please suggest some simple softwares for that .
Use the same system, with centralized config stores and replicating
configs to remote locations via rsync over ssh. Anyway, one admin should
be able to monitor about 75-100 postfix systems easily, so long as you
keep local configs reasonably alike. You do have a good admin, right?
Use pflogsumm.pl to monitor your postfix installation.

Of course, use the postfix canonical maps :).
[EMAIL PROTECTED]    [EMAIL PROTECTED]

> 3.I have a 128 kb BW to vsnl which i think should be sufficient for the
> gateway server .
> I already have some 75 % of my locations on VPN setup so the access to the
> servers by the branches would be fast .
Is this frame relay or VPN? Frame relay will be fast, VPN not
necessarily so.

> 4. How do i make my setup more robust in terms of failsafe and redundancy Do
> i put another server. as a stand by I can put another server into use but
> how do i configure it .
Configure it as the secondary MX, using permit_backup_mx and
relay_domains in postfix.
 
> 5.I wanted a setup similar to VSNL where in the mails that are down loaded
> are not on the server untill specified by the user and only the new mails on
> the server are available on the web.
Errrr, is that POP or IMAP? I suggest using IMAP since you are using
cyrus.

I would recommend a setup like:

Internet->MX (filter for spam)->AV gateway->Local servers->Mailbox.

Your incoming MX acts like a firewall setup, so see the postfix FAQ for
running postfix on a firewall.
Amavisd+Filescan for the antivirus scanning.
Amavisd feeds back into postfix which sends mail to the local servers
via canonical maps.

Devdas Bhagat

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