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No transport provider was avaliable for delivery to this recepient

Posted on 2010-09-16
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Last Modified: 2012-05-10
Be patient, this is ugly.
My client refuses to connect his Exchange 2003 to the internet for security reasons. But he does have an ATT email account for external email. We use Outlook 2003 with two email accounts, Exchange and POP, with POP being the default. Emails are stored on Exchange once they arrive in Outlook.
The mailbox is 8GB.
We have Cache turned on, but he was frequently getting "outlook did not close properly" which required checking Outlook (about 10 to 15 minutes).
So I turned off cache and restarted Outlook so we could avoid the improper closing issue.
But when I did that, I started getting
"No transport provider was avaliable for delivery to this recepient"
on all his outgoing emails.
SOOOO, I had to turn Cache back on.
I have deleted his OST in the past and would like to avoid it if possible.
I ran scanost but that didn't help.

Here's the question: Why the hell can't I turn off Cache and still send emails?
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Question by:babiape
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Expert Comment

by:Malmensa
ID: 33689184
Have you tried manually specifying which account you send email out via?  Do both fail?  

BTW, this is a really really ridiculous setup, and will be a constant pain to use.
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Author Comment

by:babiape
ID: 33689197
yes, he manually selects the Account to send from. and neither of them worked.

And he and I have had lively debates about the setup, but since he pays for my time, I just remind him periodically and then bill him.
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LVL 17

Expert Comment

by:Malmensa
ID: 33689219
Have you tried creating an SMTP log & seeing what is in it?  

http://support.microsoft.com/kb/300479
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Accepted Solution

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babiape earned 0 total points
ID: 33786012
Sorry for the delay.  Still not exactly sure what caused the error, but since it went away when I turned Cache back on I left it there.
Fortunately, we found out the downloading iTunes podcasts while working WILL affect Outlook's response time. Once we stopped that we stopped having problems.
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