C:\Documents and Settings\user>telnet mx1.hotmail.com 25
Connected to mx1.hotmail.com.
Escape character is '^]'.
220 SNT0-MC4-F19.Snt0.hotmail.com Sending unsolicited commercial or bulk e-mail to Microsoft's computer network is prohibited. Other restrictions are found at http://privacy.microsoft.com/en-us/anti-spam.mspx. Tue, 27 Nov 2012 09:36:02 -0800
250 SNT0-MC4-F19.Snt0.hotmail.com (18.104.22.168) Hello [10.10.10.10]
mail from: <email@example.com>
250 firstname.lastname@example.org....Sender OK
rcpt to: <email@example.com>
550 Requested action not taken: mailbox unavailable
rcpt to: <firstname.lastname@example.org>
221 SNT0-MC2-F36.Snt0.hotmail.com Service closing transmission channel
Connection closed by foreign host.