Send mail using SMTP Server fails when a user is at a specific location and connected to the server. All other WAN locations tested do not have this issue.
Steps to reproduce the problem
Send email via SMTP server is called in a script. If this script is called from a specific WAN address, this step fails with error 1502. Testing of this same script via alternate WAN addresses yields a successful email.
Email is sending via SMTP server, which says to me, regardless of how this script was run, the server should send the email as if run from any other workstation, local or not.