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Microsoft outlook exchange

Posted on 2012-12-26
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My company is using Microsoft Outlook Exchange and i was wonderign does it usea diferent port for trasmitting the email over the internet? is is under port 80?.
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Question by:JerseyGiant
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by:Lee W, MVP
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Outlook is a mail program.

Exchange is a mail server.

They were designed to work together, but they are separate products and one doesn't actually NEED the other.

Exchange uses standard SMTP to transmit mail over the internet.  Communication between Outlook and Exchange can be done via RPC over HTTP (port 80), RPC over HTTPS (port 443), POP3 (Port 110 - mail delivery), SMTP (port 25 - in conjunction with POP3), or IMAP (port 143), and MAPI (initially using port 135 and then a random port).

If you're not familiar with those terms, I recommend Wikipedia or google.  

And keep in mind, many (but not all) of those ports CAN be changed for generally aren't.  Further, there are secure versions of some of those protocols that can also use different ports.
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by:Lee W, MVP
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If you were more specific in your question, we might be able to offer a better, more direct answer.
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by:JerseyGiant
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thank you leew.

what i am getting at is we get our mail via the web using microsoft outlook website.. microdoft365.com.

no is that email sent to me using port 80 or is it sent to me using a different port. i would like to control my traffic ecoming in and out on my ports and email would be one of them but i cant change the internet port %speed if the email is using 80.. does that help clear it.. sorry if i am not putting it the right way
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by:Lee W, MVP
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MOST LIKELY, you're using port 443.  Using port 80 would mean the traffic is unencrypted and a potentially huge security risk.
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by:Lee W, MVP
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Of course, test, but I would expect that to be the only issue.
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by:JerseyGiant
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thank you.. what would be a good test
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Lee W, MVP earned 500 total points
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Setup a firewall and put one machine behind it and only open port 443 outbound.
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