Why can't I send email?
The most common protocol (method) for sending mail on
the Internet is called SMTP. One of the disadvantages
of SMTP is that it has no support for authentication of
the user. In other words, the protocol has no way of
making sure that the users who are trying to send email
actually are who they say they are.
Because of this, the SMTP protocol can be exploited to
send unsolicitied junk email ('spam'). People could
'get into' any machine and send hundreds or thousands of
email messages without ever logging in. This is called
'relaying.' Service providers such as ENoor have had to
come up with a way to authenticate the users to prevent
this from happening.
If you get a message that indicates that the connection
to the mail server failed, but you are able to access
the Internet, then your ISP is probably blocking you
from all SMTP servers except their own. This is so that
if they ever need to know who sent out a particular
email, they can trace it back to the appropriate user
account. The thing to do in this case is to change your
SMTP server to that of your ISP. Contact your ISP for
the SMTP server that you should use.