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15 posts


#92500 31-Oct-2011 10:46
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I have a problem with my outlook 2010 install, has been working fine for a long time, but within the last month i can no longer send emails with attachments. everything else works normally. the attachments can be as small as 60kb and they will not send, just comes back with an unknown error.

I just installed thunder bird on a different PC, and could successfully send emails with attachments with the same account settings

Looks like a common issue as a lot of people report this same error. I don't want to lose all my emails and contacts, is there a way I can delete my account and/or database and create a new one without losing everything as I think that's what the issue may be? My mail database is only 150mb.

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3343 posts

Uber Geek


  #539468 31-Oct-2011 10:54
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If you could post the exact error you are getting that may help.


155 posts

Master Geek

  #539469 31-Oct-2011 11:01
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Change of anti virus that might be blocking them?



15 posts


  #539482 31-Oct-2011 11:17
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I am using avast antivirus, I have been using that for years, but i did disable it for an hour and tried again and the email still failed to send (even sending from me to myself)

error I get is: 0x800CCC61

which I believe is an SMTP unknown error.

42 posts


  #539525 31-Oct-2011 12:26
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If an anti virus is corrupt it may be stoping it, and when it is disabling it may not stop the problem, try uninstalling it then test your outlook. If that doesnt work you can save all your emails and contacts but give this a try first


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  #539682 31-Oct-2011 19:08
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Ok installed thunder bird on the same PC, it works for sending attachments, this is without touching anything.

so its definitely isolated to being an outlook issue.

Might try and back all the data up then reinstall the software.

42 posts


  #539890 1-Nov-2011 13:24
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easiest way, just copy the pst file and there should be no problems

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