I was hoping the fix would be easy, but it doesn't look like it.
If we take the error message at face value, either
A. Your Windows Mail is sending non-standard data, or
B. The mail.btinternet.com server is misinterpreting data sent by your
Windows Mail as non-standard.
Frankly, neither one of those two possibilities is very likely.
The only thing left to try is some other combinations:
1. Try sending through a different SMTP server.
2. Try sending from a different PC.
3. Try a different email program.
Gary VanderMolen
"Tony" <tton@hotmail.com> wrote in message news:uUHG24g1HHA.4500@TK2MSFTNGP02.phx.gbl...
>I am using Nod32 with email scanning turned off.
>
>
> "Gary VanderMolen" <gary@NoMail.invalid> wrote in message news:#xLMIog1HHA.3940@TK2MSFTNGP05.phx.gbl...
>> Windows Mail is not compatible with some antivirus programs.
>> Make sure you are not running a non-compatible antivirus program
>> like Norton or McAfee. Those should be uninstalled and replaced
>> with a compatible antivirus like the free version of Avast:
>> http://www.avast.com/eng/download-avast-home.html
>>
>> Gary VanderMolen
>>
>> "Tony" <tcawton@hotmail.com> wrote in message news:20365AB8-86FC-455A-B3B2-AC26BBEF38E6@microsoft.com...
>>> Hi, I keep getting the following error message. I have visited the webpage quoted in the error but it doesn't mention Windows
>>> Mail.
>>>
>>>
>>> An unknown error has occurred. Subject 'Read: !!!!YES!!!!', Account: 'Orange', Server: 'mail.btinternet.com', Protocol: SMTP,
>>> Server Response: '451 See http://pobox.com/~djb/docs/smtplf.html.', Port: 587, Secure(SSL): No, Server Error: 451, Error
>>> Number: 0x800CCC6A
>>>
>>> Any help greatly appreciated.
>>> Regards
>>> Tony