helllllllllllllllllllllp meeeeeeeeeeeeeeeeee please


i would be very happy and greatfull if  anyone give me the answer to these question in details or the links of the web pages that may have the answer.....

1- what are the specification of the minimum hardware and software required to
deploy any email system and why?

2-what is a proxy server and why do we use a proxy server on the network?

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dbusherConnect With a Mentor Commented:
  1. They server requirements for a mail server can be defined as a minimum requirement and a suggested requirement. A min req is just enought machine to install the mail sw and probably allow several users to run on it. A suggested req. is what is real world. Using MS mail products and IBM Lotus Notes as an example I will give you a suggested config:
-Pentium class cpu ( 500mghz or more).
-256 MB RAM
-RAID 1 disk storage of a LEAST 1 gig. ( RAID 1 being mirrored drives).
-CD ROM and floppy
-NIC (Network Card) @ 10/100 base
-Backup Exec Pro (tape backup system).
   2. Proxy servers go hand in hand with Firewalls. They are usually dedicated servers that run Proxy software (Microsoft makes a Proxy product). A Proxy server will usually be 'multi-homed' meaning having 2 NICs. One NIC will have an IP for the customer LAN the other NIC will be an IP (non-private) that is exposed to the outside world (Internet).  The proxy server acts as a 'guard', checking each data packet that goes in and out. Usually you will include a proxy server on your firewall.  A proxy server will tell where the users are going on the intra/extra and internet.  Its a sort of like a tracking system and helps the network engineer to deside if certain URLs or PORTs need to be blocked for LAN protection.

Hope this helps.  Let me know if you need more info as these two topics can be expounded on greatly.  
Even though this sounds suspiciously like homework, and we don't want to do your homework for you, this link will explain Microsoft's Proxy server. The concept is the same for any proxy server, just implementation is different.

As far as the email system, the field is so varied with high-end to low-end systems that it just all depends on:
- how many users
- what else you want it do do except email
- security requirements
- what client software you want to use

Minimum hardware is an old 386 with 32Mb Ram and Linux (free)software. Sendmail and POP3 email are basic parts of a basic Linux install, and it runs just fine on any old 386/486 PC that you can get pretty cheap..
The email server where I work is a Dual Zeon 550 with 2 GB of memory and 12 10K RPM disks. What Lmoore wrote about the email is completely correct. There is no way to answer how much hardware you need without knowing at the very least what email program you are using. Besides just basic email, programs like Microsoft Exchange provude calendar, task lists and etc... and allow multiple people to collaborate on any one of those things. In addition, you'll find that many companies use some sort of integrated messaging system to provide Fax and voicemail services as part of their email program.

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   jjeff1 has a good point. It is hard to tell you EXACTLY what type of hardware you should run without more info. But assuming you are sticking with INTEL based systems (not RISC), then I can tell you that when I worked at IKON Office Solutions as thier net eng. we used a single Compaq Proliant with the exact specs as I gave in my prior post. It worked fine for a local company of just under 400 users.
If you were to add fax, voicemail etc.. options I would NOT recommend adding to a mail server.  I would get seperate servers to run that sw.  That would be a bad practice.
> what are the specification of the minimum hardware and software required to deploy any email system and why?

I used to have an IBM PS/2 system with a 286 processor,
running at 10Mhz, with 2Mb of RAM and a 20MB (not 20GB) hard-drive,
and I could run an E-mail client on that system,
and read my E-mail.

Is that "minimal" enough?  :-)

Of course, the "mail-server" was larger.
I'll leave the specifications for that as an exercise for the reader.  :-)

We use a proxy-server to monitor the managers who try to web-surf to pr0n sites using company resources on company time.   :-)
ranma51, Have any of the comments above answer your questions?  Can we help further?

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