Use telnet to test the SMTP connection from the machine.

Here is a sample session.
Start a DOS session, type in the items in bold:

C:\Windows>telnet smtp.cintas.com 25

220 smtp.cintas.com SMTP V05R02M00 on Tue, 10 Feb 2004 11:41:46 +0100.

helo mypc.cintas.com

250 smtp.cintas.com.

mail from: <creamerm@cintas.com> From display name

250 OK.

rcpt to: <creamerm@cintas.com> To display name

250 OK.

data

354 Enter mail body. End mail with a '.' in column 1 on a line by itself.

Subject: Type mail subject here



You must leave a blank line after the mail headers (like Subject)

Type your message, then type a “.” on it’s own to end the message.

.

250 OK.

quit