When sending emails from PlanetPress Production/Watch, I receive sporadic errors in my logs as follows:

INFO : Connect to server SMTP
ERROR: W3001 : Error while executing plugin: Socket Error # 10054
Connection reset by peer.
ERROR: Send Email: W1603 : Plugin failed

I have checked with our Exchange admin, and he saw no errors on the server end. I have also had the McAfee anti-virus checked out on the server where PlanetPress is running, and nothing there is blocking SMTP traffic. We also are NOT running Windows Firewall on the PlanetPress server, so that is not the issue. The error does not always occur; this is a sporadic error. Has anyone seen issues of this nature, and, if so, what was done to correct the problem? TIA for your help.

Basically this error means the server has closed the connection unexpectedly, maybe it does timeout or restart sometimes for any reason.
Difficult to investigate if it's sporadic.

Is there some type of extended logging that could be enabled to see what's actually happening?

you just could enable verbose logging for the Messenger and have the General log level on all events with details (Workflow Preferences, section Plug-in).

Thanks, I tuned up the logging and will see what I get.

I finally solved this issue by simply installing the SMTP server feature locally on the server that's running PlanetPress, vs. relying on a remote SMTP server. I believe that the issue lies in the network/firewall, and rather than going down that rabbit hole, it was much easier to just take this approach (after ensuring that the SMTP server isn't an open relay, etc.)