Re: javax.mail api issue

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#337

From: Gillmer J. Derge (TeamB)
Date: Wed, 18 Feb 2004 21:26

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George wrote:
> Excuse my networking ignorance but I'm curious: how does Yahoo Messenger
> work on my PC at work?  That needs to connect externally too.

Each type of service uses a different port number.  For example, HTTP 
uses port 80, NNTP (news) is port 119, POP is port 110, etc.  Firewalls 
typically block specific ports, so blocking port 110 for POP is quite 
common.  They probably just don't have a filter on whatever port 
Messenger is using.  That's also the same reason you can probably reach 
external sites with your web browser -- it's a different port.

-- 
Gillmer J. Derge (TeamB)

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