I can receive e-mail but  not send it.  Gives no specific error message number.  All outgoing messages go to Outbox.  I have checked with my DSL ISP and e-mail works on their site but not in Windows Live Mail.  Have tried disabling firewall & anti-virus with still no success.  Am using outgoing port 25 - tried changing it as suggested in one response, but still won't send e-mail.