I am using Charter.net email with Windows mail. When I try to send a message
with let's say 6 pictures attached to it, the send/recieve process takes a
considerable amount of time longer than normal and then I get the following
error message:
An unknown error has occurred. Subject '', Account: 'pop.charter.net',
Server: 'smtp.charter.net', Protocol: SMTP, Server Response: '421 charter.net
Lost connection to [24.178.143.44]', Port: 25, Secure(SSL): No, Server Error:
421, Error Number: 0x800CCC67
I hope this helps. At first I thought that I was trying to send too much
all at once so I cut it down to one photo and the same thing happened.