Some firewalls even though they say are not blocking anything, they do have "Inherit" rules that block certain High number ports. Also NAT casuses sometimes cause issues. The following articles should be able to help you out. I have seen this many times... And it's very annoying Good luck
http://support.microsoft.com/default.aspx?scid=kb;en-us;305572 http://support.microsoft.com/default.aspx?scid=kb;en-us;304849 http://support.microsoft.com/default.aspx?scid=kb;en-us;311506 http://support.microsoft.com/default.aspx?scid=kb;en-us;319572 http://support.microsoft.com/default.aspx?kbid=155831 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Adams, Kevin C. Sent: Tuesday, March 30, 2004 2:04 PM To: Exchange Discussions Subject: RE: [Q] How outlook communicates with Exchange 5.5 Ok I take that back, there are, but they are not blocking anything. At least nothing in the settings is enabled. K -----Original Message----- From: Roger Seielstad [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 30, 2004 10:53 AM To: Exchange Discussions Subject: RE: [Q] How outlook communicates with Exchange 5.5 It is a networking issue. Exchange sends UDP packets to Outlook (on a pre-negotiated port) for new mail notifications. Any personal firewalls in place? -------------------------------------------------------------- Roger D. Seielstad - MTS MCSE MS-MVP Sr. Systems Administrator Inovis Inc. > -----Original Message----- > From: Adams, Kevin C. [mailto:[EMAIL PROTECTED] > Sent: Tuesday, March 30, 2004 10:48 AM > To: Exchange Discussions > Subject: RE: [Q] How outlook communicates with Exchange 5.5 > > Well, since you asked.... > > We use ever prevalent blackberry mobile device here at my > organization. Had > a question from a user about why email sometimes hits his > blackberry before > it shows in his inbox. A little searching turned up the fact that > frequently, the user has to do something in outlook for mail to be > "received". (Its been there, just not visible in outlook) > Was wondering if > there is some poling interval in outlook (we use 2002 right now) that > governs how often outlook checks for new mail, or if there is > something > else. I realize it could be a networking issue, but wanted > to check out all > angles. > > Thanks in advance for any help you can offer. > > K > > -----Original Message----- > From: Chris Scharff [mailto:[EMAIL PROTECTED] > Sent: Monday, March 29, 2004 3:36 PM > To: Exchange Discussions > Subject: RE: [Q] How outlook communicates with Exchange 5.5 > > > It communicates using MAPI. As much detail as possible would probably > involve reading "Inside MAPI", which is a good book generally, though > out of print and not something the typical administrator needs to > master for day-today operations. Is there something specific you are > researching? You > can sometimes pick up a copy of the book on www.half.com and I believe > there's a CD/PDF version available as well. I have a couple > of copies on the > bookshelf here... good stuff. > > -----Original Message----- > From: Adams, Kevin C. [mailto:[EMAIL PROTECTED] > Posted At: Monday, March 29, 2004 2:20 PM > Posted To: swynk > Conversation: [Q] How outlook communicates with Exchange 5.5 > Subject: [Q] How outlook communicates with Exchange 5.5 > > Hi, > > I'm looking for information in as much detail as possible, about how > outlook communicates with the exchange server. I keep finding bits > and pieces here and there, but obviously I'm not searching right. > Any help is > appreciated. > > Thanks much! > > K > > Oh, outlook 2002 if that's of any consequence. > > > > _________________________________________________________________ > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > Web Interface: > http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&t ext_mode=& > lang=english > To unsubscribe: mailto:[EMAIL PROTECTED] > Exchange List admin: [EMAIL PROTECTED] > To unsubscribe via postal mail, please contact us at: > Jupitermedia Corp. > Attn: Discussion List Management > 475 Park Avenue South > New York, NY 10016 > > Please include the email address which you have been contacted with. > > > > > _________________________________________________________________ > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > Web Interface: > http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&t ext_mode=&lang > =english > To unsubscribe: mailto:[EMAIL PROTECTED] > Exchange List admin: [EMAIL PROTECTED] > To unsubscribe via postal mail, please contact us at: > Jupitermedia Corp. > Attn: Discussion List Management > 475 Park Avenue South > New York, NY 10016 > > Please include the email address which you have been contacted with. > > > > _________________________________________________________________ > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > Web Interface: > http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&t ext_mode=&lang=english > To unsubscribe: mailto:[EMAIL PROTECTED] > Exchange List admin: [EMAIL PROTECTED] > To unsubscribe via postal mail, please contact us at: Jupitermedia > Corp. > Attn: Discussion List Management > 475 Park Avenue South > New York, NY 10016 > > Please include the email address which you have been contacted with. > _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang =english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. 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