All of a sudden, my Mac won't connect to my smtp outgoing mail server...

It looks for a connection, but never connects. No issues until this week, it's been working fine for 14 months.
Settings verifed with the ISP (Cox) but beyond that they were of no help. Mail sits in Outbox and won't send.
Anyone had this issue and how did you fix it?
Thanks.

I would troubleshoot by disabling firewall trying other devices like smart phones or other computers to see if they can
then I would look in the routers settings and verify using the webmail option that the password was not changed

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Problems such as yours are sometimes caused by files that should belong to you but are locked or have wrong permissions. This procedure will check for such files. It makes no changes and therefore will not, in itself, solve your problem.
First, empty the Trash.
Triple-click the line below to select it, then copy the selected text to the Clipboard (command-C):
find ~ $TMPDIR.. $ -flags +sappnd,schg,uappnd,uchg -o ! -user $UID -o ! -perm -600 -o -acl $ 2> /dev/null | wc -l
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window (command-V). The command may take a noticeable amount of time to run. Wait for a new line ending in a dollar sign (“$”) to appear.
The output of this command, on a line directly below what you entered, will be a number such as "41." Please post it in a reply.

All of a sudden my mac won't open power points that I have saved on my flashdrives

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It could be opening it in a different (incompatible) application. If you have Office for Mac 2008 or 2011 then try opening Microsoft Office on your Mac first, and then opening the relevant Microsoft Office document.
As MGW has said, Microsoft Office 2010 is the Windows version, and will not run on a Mac. If you do not have a Mac version of Mirosoft Office, you will either need to purchase it from microsoft.com/mac, or go to the Mac App Store and buy Keynote which is Apple's equivalent of PowerPoint. However, while it is incredibly compatible with Office documents (Apple's productivity suite), you may be better off getting Microsoft Office if you want to ensure full compatibility with the Microsoft Office document formats. However, Keynote is considerably cheaper being in the Mac App Store.

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tt2

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http://support.apple.com/kb/TS3899
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http://ipadhelp.com/ipad-help/ipad-cant-send-emails-troubleshooting-steps/
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MicrosoftWindows Vista Home Premium Edition Service Pack 2 (Build 6002)
DellInc. Inspiron 530s
iTunes10.4.1.10
QuickTime7.7
FairPlay1.12.20
AppleApplication Support 2.0.1
iPodUpdater Library 10.0d2
CDDriver 2.2.0.1
CDDriver DLL 2.1.3.0
AppleMobile Device 3.4.1.2
AppleMobile Device Driver 1.57.0.0
Bonjour3.0.0.2 (333.2)
GracenoteSDK 1.9.1.485
GracenoteMusicID 1.9.1.102
GracenoteSubmit 1.9.1.133
GracenoteDSP 1.9.1.43
iTunesSerial Number 00C9ABD80C0C17E8
Currentuser is an administrator.
Thecurrent local date and time is 2011-09-16 09:59:06.
iTunesis not running in safe mode.
WebKitaccelerated compositing is enabled.
HDCPis not supported.
CoreMedia is supported.
VideoDisplay Information
AdvancedMicro Devices, Inc., ATI Radeon HD 2400 Pro
****External Plug-ins Information ****
Plug-inName:     ilikesidebarplugin.dll
Plug-inLoaded:     Yes
Plug-inVersion:     Unknown
Plug-inFile Version:     0.1.2.17
Plug-inPath:     C:\Program Files\iTunes\Plug-ins\ilikesidebarplugin.dll
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iPodService10.4.1.10 is currently running.
iTunesHelper10.4.1.10 is currently running.
AppleMobile Device service 3.3.0.0 is currently running.
****Network Connectivity Tests ****
NetworkAdapter Information
AdapterName:     {185DA300-4391-4FBB-9BC2-AC4894001787}
Description:     Intel(R)82562V-2 10/100 Network Connection
IPAddress:     0.0.0.0
SubnetMask:     0.0.0.0
DefaultGateway:     0.0.0.0
DHCPEnabled:     Yes
DHCPServer:
LeaseObtained:     Thu Jan 01 01:00:00 1970
LeaseExpires:     Thu Jan 01 01:00:00 1970
DNSServers:
AdapterName:     {63090950-4731-4D95-89CB-57F1B6ABBACC}
Description:     Broadcom802.11g Netværkskort
IPAddress:     192.168.1.106
SubnetMask:     255.255.255.0
DefaultGateway:     192.168.1.1
DHCPEnabled:     Yes
DHCPServer:     192.168.1.1
LeaseObtained:     Fri Sep 16 01:34:21 2011
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194.239.134.83
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Online:          Yes
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Connectionattempt to firmware update server was successful.
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My mac won't connect to the router.

I am very new to macs and recently bought a Macbook pro, I have connected to my router a D-Link, DSL-G604T but when I enable WEP security the mac won't connect only my PC's will. I am prompted by the mac to put in my Encryption key but it still doesn't work. I am able to to set the router to WPA-PSK but get stuck on the length of the string that I am supposed to put in? Will this set up work better?? Very stuck mac virgin, pleas help.

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Note: Because manufacturers may use different algorithms to translate between ASCII & Hex, that this doesn’t always work, and is one of the leading causes of issues with keys.
(ref: http://docs.info.apple.com/article.html?artnum=106424)

All of a sudden, my Mac won't connect to my smtp outgoing mail server...

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