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GwindylynFlag for United States of America

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Outlook 2007 POP emails are stuck in the Outbox

Last week one of my workstation's Outlook 2007 stopped sending emails.  Nothing has changed on this workstation.  The emails all just get stuck in the Outbox.  I am able to send the email sent from within "Test Account Settings..." properly.  I have also tried the following:

Uninstalled the antivirus.
Turned off the firewall.
Cleared out the Outbox and tried sending just one email out.
There are five other workstations with the same settings that all work fine.
Created a new outlook profile.
Removed and then added the POP email address and settings.
Tried different SMTP port settings.
Can send without problems from other computers on the same LAN and can send test messages from the problem workstation.
Tried running outlook.exe /noextensions and outlook.exe /safe then tested after each.
Ran Office Diagnostics.

Did I miss anything?  None of the above have fixed my problem.  I do not get any Send/Receive errors so I am not sure how to further troubleshoot this.  Any help would be greatly appreciated since I am at my wit's end.
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faizbaig
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Any firewall in use ?
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ASKER

I disabled the firewall as I mentioned in #2 of my action list.
Please advice what kind of internet connection in use ( ADSL or broadband) ? , any proxy server ? , hardware or software firewall in use ?
ADSL internet connection with no proxy server and no firewall in use.  

I forgot to add to that list that I have disabled all add-ins as well.
Do you have spare ADSL router to try ? and if any firewall utility under ADSL router try disabling it.
+
-> Did you try resetting the Email account password ?
-> Can you access this account via web ? can you send and received ?
..also I would recommend to Reset internet protocol on trouble pc and try.

How to reset Internet Protocol (TCP/IP)
http://support.microsoft.com/kb/299357
No spare router. I have five other machines that are working just fine so I do not think it is the router. Like I said before, any and all firewalls have been disabled. Resetting the email password seems pointless since I am able to send the email sent from within "Test Account Settings..." properly.  I can access it via the web and it can also receive.
My TCP/IP settings are fine seeing as I can connect to the Internet, send the test email and receive emails.
Did you mean, when this account setup on different machine you could send mails ? If 'Yes'.
 I see this is typical Windows base issue need rebuild and setup again..since all options are tried.
Not sure where you got that from but no this account was not setup on a different machine.
Must try,that will proof its a windows issue, isn't  it ?
Plus I have my doubts on router too. I have face similar issue with only one pc could not send mails and it turn out to be Router issue.
Your Reset Internet Protocol suggestion did not work.  And my problem computer CAN send emails since it was able to send the test email so it is not my router.
Test mail is internal sending ( within computer) is in it ?
No it is not internal. It is sending out using POP email account.  I can access the email via the web.
Got it.

Like you said tried "Created a new outlook profile.",  after creating did you try without  linking to existing .pst ? If 'Yes', than only option left to check is from different pc and that will proof  this unique or typical windows base issue.
A different PC can send and receive just fine.
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Gwindylyn
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Please try this
Scan or Repair you trouble PST with Scanpst.exe  and try.

How to use the Inbox Repair Tool
http://support.microsoft.com/kb/287497
Yeah I already did that and it did not solve my problem as the PST is not corrupt.  Thanks anyway.
Try Office 2007 SP3
http://www.microsoft.com/download/en/details.aspx?id=27838

There were some issues with mail getting stuck in outbox
I had already done all of the things the other person suggested.