Mail app blocks my internet connection

Hi everybody!
I've got this strange problem. When my default Mail app is opened and I'm trying to read my e-mails, suddenly the whole connection is ruined. I can't browse any pages in Safari, neither in Firefox. However Skype is working. When I force quit Maill app everything backs to normality in about a minute.
What's the issue? Could you help me? I would be thankful, because it's a very frustrating issue...
EDIT: Sparrow did that too...

Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, or by corruption of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. Note: If FileVault is enabled on some models, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including sound output and Wi-Fi on certain iMacs. The next normal boot may also be somewhat slow.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin. Test while in safe mode. Same problem? After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.

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Hi laptopman, Welcome to Apple's Users Help Users Forums.
Glad you got it solved. Yep even Apple Forums will slow to a crawl or have Servers lock up.
Thanks in Apple Forums is through the Stars system. See the blue box at the top of the thread as well as the Apple emails re new posts to the thread.
With the buttons just to the left of "Reply" for the OP = Original Poster.
1 Green Solved available. 10 pts
2 Gold Helpful available. 5 pts.
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hi everyone,
first of all i want to say im polish so... sorry for my english ;p
im my language there is only one article about automatic connection forced by on n8-> http://translate.google.pl/translate?js=n&prev=_t&hl=pl&ie=UTF-8&layout=2&eotf=1&sl=pl&tl=en&u=http%...
i figured out its propably by nokia ovi store.
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Menu -> Settings -> Connectivity -> Settings -> Switch to WLAN
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MAIL LOG???

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How do I use Mail on a shared internet connection

Hello All;
I've tried searching the forums, and either I'm using the wrong search terms, or this question is so basic no one else is having problems....
My wife and will sometimes be in a hotel that has an ethernet cable for internet access. We both travel with our laptops (sad life, I know...) and use the internet. We usually plug the cable into her MBP and then I set up internet sharing to my iBook. Which works fine, except that Mail can't make a connection and I have to check my email accounts by going to the browser interface for each. I have several, which is why I set Mail up to work with them. Not a big problem, but annoying. Finally, sitting here in Ottawa I decided to do something about it since I'm waiting for it to warm up a bit - its something like -20C this morning.
Is it as simple as turning off the MBP's firewall? Or adjusting it? I don't like playing with the security settings, if I don't have to, for her MBP because it is vital for her work.
We are both using 10.4.11, and as stated above - she has a Mac Book Pro and I'm using a G4 iBook.
Thanks in advance....
Brrrrr - its cold out there.....

Hello Seth.
I believe you must go to System Preferences > Sharing > Firewall on the computer that shares its Internet connection and enable the ports that Mail needs, i.e. click on the New button, choose Other from the Port Name popup menu to name that setting however you wish, and specify the port number(s) there.
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TCP/IP: Ports And Firewalls Explained
"Well Known" TCP and UDP Ports Used By Apple Software Products

Mail app blocks my internet connection

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