A recent version of the Trend antivirus program (details not
available) causes problems in Windows Mail. Just disabling
it seldom helps; you usually have to uninstall it instead.

You then sometimes need to remove your email account under
Windows Mail, then restart Windows Mail and add the
account again.

Also check if this hotfix applies:

http://support.microsoft.com/default.aspx/kb/941090

Although it's labelled as for mail stuck in the Outbox, it also works in
other folders.

If this cures your problem, you may want a replacement antivirus
program that doesn't cause such problems in Windows Mail. Most
versions of the Norton and McAfee antivirus programs are bad
choices; they seem to cause problems in Windows Mail even more
often. I recommend either avast! or AVG, either one with a custom
install where you tell it to leave out the parts that scan email.

http://www.avast.com/eng/avast_4_home.html

http://free.grisoft.com/ww.download?prd=afe

Neither of these includes antispyware. For that, I use three more
programs:

http://www.safer-networking.org/en/spybotsd/index.html

http://www.lavasoft.com/single/trialpay.php

<http://www.microsoft.com/downloads/details.aspx?FamilyId=435BFCE7-DA2B-4A6A-AFA4-F7F14E605A0D&displaylang=en>

"Steve" <Steve@discussions.microsoft.com> wrote in message
news:2E5717B2-C4DB-407D-8D79-D95C6B10BB89@microsoft.com...
>I am not using wireless. I have trend micro antivirus plus spyware
>
> "robertmiles@bellsouthNOSPAM.net" wrote:
>
>>
>> "Steve" <Steve@discussions.microsoft.com> wrote in message
>> news:995CA3D9-1A63-4768-AC75-6DFC8D051D8E@microsoft.com...
>> >A few weeks ago I couldnt send emails and get this message
>> > Your server has unexpectedly terminated the connection. Possible causes
>> > for
>> > this include server problems, network problems, or a long period of
>> > inactivity. Subject 'Are you working', Account: 'windows mail', Server:
>> > 'smtp.charter.net', Protocol: SMTP, Port: 25, Secure(SSL): No, Error
>> > Number:
>> > 0x800CCC0F
>> > I can still recieve but cant send.
>>
>> Were you still using charter.net as your internet provider while getting
>> this
>> message? If you're using a wireless connection, your computer is likely
>> to occasionally use your neighbor's wireless server instead of yours, and
>> therefore your neighbor's internet provider. Connections to port 25
>> that cross over from one internet provider's equipment to another's are
>> often blocked to cause trouble for spammers. Unfortunately, cable
>> companies are unlikely to let you switch to using some other port
>> instead,
>> in order to avoid this problem.
>>
>> Also, see if this helps:
>>
>> http://www.charter.com/customers/sup...articleid=1781
>>
>> A number of problems in Windows Mail are due to interference from
>> antivirus programs, and such problems are often slow to show up. What
>> if any antivirus programs do you have, and have you ever had a Norton
>> or McAfee antivirus program on that computer, even one of the trial
>> versions that often come already installed on new computers?
>>
>>
>>