First of all go to Start ->
Run, from here type telnet
(alternatively go to command prompt and type
telnet)
When telnet comes up type open mail.xxxx.com 25
(Where xxxx is the name of the server i.e. Yahoo and 25 the
port)
After this type: helo
smtp.mail.xxxx.com push enter you should get a
message such as 250...............HELLO
Now from the email itself:
Type mail from:xxxx@xxxx.com (This
is the address you want it to look from)
Now type rcpt to:xxxx@xxxx.com
(This is who you are sending to)
For the message type data and just
write your message here when finished writing press
return then press . (The full
stop button) and then return again you should now have a message
saying message sent or qued.
The server encountered an internal error or
misconfiguration and was unable to complete
your request.
Please contact the server administrator at
webmaster@systemmanager.forsenergy.ru to inform them of the time this error occurred,
and the actions you performed just before this error.
More information about this error may be available
in the server error log.
Additionally, a 500 Internal Server Error
error was encountered while trying to use an ErrorDocument to handle the request.