Re: exchange basics

Thanks very much ... I really appreciate your reply on Exchange for Dummies.

Questions:
1. POP3 host if so configured: Does that mean Exchange is not configured as
a POP3 host out-of-the-box ?
2. If Exchange is not configured as a POP3 host, what does it use as a
message retrieval protocol ? Is it Exchange native ?
3. Of POP3 host and Exchange native host, can Exchange support both at the
same time ? Or just one or the other ?
*In other words, on the MUAs side, say, we have 10 users running Outlook
2003, and we have Exchange configured as POP3 host. Can 5 of the users
configure their Outlook to connect to POP3 server while the other 5 users
configure their Outlook to connect to Exchange server ?
4. Is there any loss or gain of functionalities if Exchange is configured as
POP3 host ?
5. What are other MTAs available out there ?

Thanks again
Steve

"Al Mulnick" <amulnick_No_SPAM@xxxxxxxxxxx> wrote in message
news:%23WpTdwvYFHA.612@xxxxxxxxxxxxxxxxxxxxxxx
> Yikes. That's confusing.
>
> Exchange is a MTA - Message Transfer Agent. SMTP is a message transport
> protocol. Exchange uses SMTP to transport messages (by default).
> Exchange is a message store. It stores your messages in a database for
> you the client using a MUA - message user agent (such as Outlook) to come
> pick it up later.
> POP3 is a protocol for picking up your mail from a message store utilizing
> a MUA. Exchange supports POP3.
> POP3 Connectors are for people that want to pick up mail from an ISP
> mailbox and put it into Exchange. POP3 is still a message retrieval
> protocol. It is not for sending. It never has been. SMTP is a transport
> protocol which Exchange uses to transport messages to other servers. When
> it does this transaction, it is the 'client' in the client-server
> terminology used to describe SMTP transactions. Your MUA, if configured to
> use POP3 as it's message retrieval protocol, will also be configured to
> use a SMTP MTA (all that really means is that you send your outgoing mail
> to a host that understands and listens for SMTP commands on a well known
> port (usually)) if you hope to send mail to anybody other than yourself.
> Not that talking to yourself is a bad thing, it's just that if you go to
> the trouble to pick up your mail, it would seem like a good idea to send
> something to others so you can share wit and humor and pictures of the
> kids doing silly things with water balloons or mud. I digress. In this
> situation, your MUA will also be a client to a SMTP MTA.
>
> Exchange natively speaks SMTP and will communicate as a POP3 host if so
> configured. If you go that route, I suggest you utilize front end servers
> so you can move mailboxes around without reconfiguring MUA's.
>
> You can read more about Exchange at http://www.microsoft.com/exchange
>
> -al
>
>
> "SP" <none> wrote in message
> news:%23jc3pqpYFHA.2756@xxxxxxxxxxxxxxxxxxxxxxx
>> Hi
>>
>> Of POP, SMTP, and whatever else, is Exchange one of those ? Or is
>> Exchange native to itself ? A class of its own - like POP and SMTP ?
>>
>> I understand Exchange itself can't be POP since it uses POP connector to
>> connect to some POP server.
>>
>> Steve
>>
>
>


.

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