Enterprise Mail Service

am 20.04.2006 15:04:14 von msarmadi

Dear Professionals

Any one has experience on enterprise mail service? I need your
knowledge :P

There are something called MX record in DNS zone records,

As far as I know, There can be multiple mail servers, MX records in DNS
zone, for a domain.

The question is, How those mail exchangers synchronize the mailboxes?
And/Or how to build a distributed enterprise mail service?

Note that, My question is not about using relay-only agents that just
spool the emails.

TIA
Best Regards
--
Mehdi Sarmadi

Re: Enterprise Mail Service

am 21.04.2006 01:20:00 von Sam

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msarmadi@gmail.com writes:

> Dear Professionals
>
> Any one has experience on enterprise mail service?

Jimmy Doohan probably did, unfortunately he's no longer with us :-(

> There are something called MX record in DNS zone records,

Yup.

> As far as I know, There can be multiple mail servers, MX records in DNS
> zone, for a domain.

Absolutely.

> The question is, How those mail exchangers synchronize the mailboxes?

Any damn way they feel like doing it. There is no universal, one true
solution. Each such mail system is designed according to the individual
needs and the requirements of the organization.

Typically, this is done in one of two general ways, but there are countless
number of actual variations on the following. One way is for each server to
maintain a list of which server has which mailbox, and automatically forward
each non-local mail to the correct server. Any number of different ways can
be used to maintain the lookup lists: from a custom script that synchronizes
the database files on all machines, to a distributed LDAP directory. The
other way is for all servers to have access to all mailboxes, via a network
mount, so it doesn't matter which server receives a message. Any server can
deliver mail directly to any mailbox. Additional servers can be brought
online to handle increased mail load, as necessary.

> And/Or how to build a distributed enterprise mail service?

The same way you'd get to Carnegie Hall.

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Re: Enterprise Mail Service

am 21.04.2006 12:41:16 von msarmadi

Thanks Sam

But,
So, do you mean there is no specific protocol for such purpose?
(Such as extension on SMTP or IMAP or sth. beside them.)

Have you ever seen this functionality integrated in any
enterprise commercial/opensource mail server software OR any addon to
bring it to them?

TIA
Regards

Re: Enterprise Mail Service

am 21.04.2006 13:00:02 von Sam

Re: Enterprise Mail Service

am 21.04.2006 13:05:54 von msarmadi

Thanks Sam

So It seems, No major company or project ever think/work on it.
And using such a model is not popular atall, isn't it?
It would be better call it a rare configuration.

__
Mehdi Sarmadi

Re: Enterprise Mail Service

am 22.04.2006 00:05:03 von Sam

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Lord writes:

> Thanks Sam
>
> So It seems, No major company or project ever think/work on it.

Certainly not. There's plenty of mail software around that's fully capable
of supporting an enormous number of mailboxes. At one time, or another,
I've been briefly involved with huge mail plants that have been built out of
pretty much every common free mail server in popular use: sendmail,
postfix, courier, qmail. The number of mailboxes ranged from a shade under
a hundred thousand, to over a million. All of them are fully
buzzword-compliant, but it takes a skilled, experienced,
architect/developer/administrator to set them up and configure them
properly.

Each individual situation is unique, and requires a unique solution and
combination of tools. There is no magical piece of code which allows you to
simply run it, put your brain in "park", and it pops up an "enterprise" mail
server. There's only one magical ingredient: you must know what the FSCK
you're doing.

If you are utterly clueless, no cornucopian bit of software is going to help
you.

> And using such a model is not popular atall, isn't it?

On the contrary, these things are fairly popular.

> It would be better call it a rare configuration.

Not really.

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