in
Messages read. Receiving reported error(0x80042108)Outlook is unable to
connect to your outgoing (SMTP) e-mail server.
I contacted my ISP and we went through all settings, all okay.
The message appeared after my pc had downloaded an auto upgrade from vista.
In a DOS shell, telnet to the SMTP mail host:
telnet <smtphostname> <portnumber>
<smtphostname> is whatever is the SMTP mail host name that you
configured in the e-mail account in Outlook. The <portnumber> is also
whatever you specified in that e-mail account in Outlook. It might be
25, 597, 465, or something else. Check if you have either SSL or SPA
enabled in the e-mail account defined in Outlook as it must match what
the SMTP mail host expects on the port on which it is listening for your
connect request.
It isn't important what you do inside the mail session with their SMTP
mail host, only that you can actually start a mail session. After
successfully connecting to their SMTP mail host using telnet, you should
see a welcome line (if SSL was not used). If you see the welcome line,
you've started a mail session and proved that you can reach their mail
host and that it will establish a connection and start a mail session
with you.