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Send a Receive Error (Outlook 2003)

by Nautica922 / April 11, 2005 6:48 AM PDT

Task - Sending reported error ( 0x800ccc78) Unable to send the message. Please verify the e-mail address in your account properties. The Server responded 556 client authentication required. Use ESMTP EHLO AND AUTH.

No idea why this comes up when I try to send E-mail. It worked fine for 9 moths then I get this message. I did not change anything at all. I?m trying to have Microsoft help me but does anyone know why I get this.

Now I can receive E-mail just fine but can?t send it. And I know the E-mail address that im sending to is correct b/c ive tried 12 different ones that I know work so.. ANY IDEAS?
If you want the pic of the error message let me know. ill E-mail it to yah.

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Contact aol customer support.
by Kees Bakker / April 11, 2005 7:18 AM PDT

They will guide you through your settings to see what's wrong.


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by Nautica922 / April 11, 2005 8:13 AM PDT

They said it Microsofts problem. Like I said im tryin to get it worked out with them but they dont seem to be responding back. Just wanted to see if anyone else has this problem.

Thanks 4 tryin tho.

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(NT) (NT) I don't think Microsoft will offer the solution here.
by Kees Bakker / April 11, 2005 5:04 PM PDT
In reply to: Nope
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by Nautica922 / April 12, 2005 11:09 AM PDT

And why would that be? I have another computer in the house that Outlook works just fine on so??

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They will say it isn't their error ...
by Kees Bakker / April 12, 2005 5:03 PM PDT
In reply to: Why

because it runs on your other machine. And right they are.

The general advices are:
- check your settings; compare with the other machine
- make a new account with the correct settings, if you can't find the error in the current settings
- check for spyware and viruses; deactivate firewall
- run the Office Removal Wizard to remove Outlook and all it settings and start anew
- reinstall Windows and start anew

The last solution should definitely help. All other are a WAG.

Good luck,


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A comment about firewall deactivation.
by R. Proffitt Forum moderator / April 12, 2005 10:15 PM PDT

In some testing I found that Zonealarm has no true disable. It kept working even when it was "disabled." I had to uninstall ZA to kill it off.


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by Nautica922 / April 13, 2005 1:06 PM PDT

I started fresh. Wiped the whole HD and started new. Still I get this message.


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Sorry to read this.
by Kees Bakker / April 13, 2005 5:50 PM PDT
In reply to: Nope

But if - after a fresh reload of Windows XP and aol software - you still get a message like

Task - Sending reported error ( 0x800ccc78) Unable to send the message. Please verify the e-mail address in your account properties. The Server responded 556 client authentication required. Use ESMTP EHLO AND AUTH.

and if it used to work in the past, then I think that either it's a wrong setting or some other software you installed besides XP (and possibly aol) interfering, or a problem with aol.

Keep searching!


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Same error hear, any fix
by vconfused / September 29, 2005 10:31 PM PDT

Was working here for a while as well, now all of a sudden getting the same error Win XP Pro SP2, Outlook 2003. Any known fixes out there?

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