1. nope
2. yep, easily
3. you will have to modify the sendmail config a little, i.e. to
put the domain masquerade in; and you should certainly
change the hosts.allow, hosts.deny, and inetd.conf for
security's sake.
2000 simultaneous smtp connections? I don't know of any machine
that can do that. That would be one machine with about
200,000 heavy mail users. Your max would more likely be
about 400, and this would be in a minute, not at the same time.
The real limitation will be POP. I would set inetd.conf
to utilise pop with the NOWAIT.400 option, to limit you
to 400 pops per minute. That way your server won't get too
overloaded. Should be able to handle it just fine. Make
sure your users' clients are set to check every 10 minutes or
longer and you should be ok. If this doesn't work for you,
then you can get an extra machine as a second pop server, or
else set everyone's clients to check every 20 minutes or later.
4. No real reason to, AFAIK. At most, you will have a couple
hundred files open.
5. Sounds like a good machine for the job. However, you might want
to pay an extra $800 for another pop server and DNS rotate between
them, or else have half your clients go to pop1 the other to pop2.
The extra pop server could be a pentium 133 or better, 64MB ram
or more, and a 2 gig HD.
Another limitation would be your network. You better have a
well planned network, or else this is going to swamp it. 400
mail checks a minute is a lot of continuous traffic.
-Sincerely,
----Patrick
==========================================================================
On Fri, 15 May 1998, Peter Chen wrote:
> Dear All
>
> Currently our ISP's Solaris server is hosting all the 4000+ email accounts
> for our staff and clients. Recently the management wants to move all the
> email accounts in-house for better control and confidentiality, but doesn't
> want to pay a Sun Enterprise Server, so they are thinking of running NT and
> Exchange Server 5.5. But I manage to persuade the management to use Red Hat
> Linux 5.5 instead.
>
> - Now am I too ambitious?
> - Can a Red Hat Linux box handle the load of a heavy mail server serving
> 4000+ clients?
> - Can a stock Red Hat 5.0 sendmail 8.8.7 handle so many users, for
> example, more than 2000 concurrent SMTP connections? Or should I recompile
> the sendmail?
> - Should I patch kernel 2.0.33 with file-descriptor patch and recompile a
> new kernel?
> - Can a Pentium II 233Mhz, Intel 440LX chipset, 256MB RAM, Asustek SC875
> UW SCSI controller, two IBM Ultrastar 9GB UW SCSI hard disks do the job?
>
> Can someone please give me some advices?
>
> Thanks for your kind advice in advance.
>
> Peter
>
>
>
> --
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