Xylem 19-001-350R2 PACE Integrated Pump Controller Human Machine Interface (HMI) for the Silent Storm VFD Pumping System – Technician Guide - Manual (Page 45)

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• If successful, be sure and type “quit” <enter>. It’s bad form to leave the server hanging
though it will reset the session itself.
• If you are unable to connect, attempt to Telnet to the POP3 server on port 110.
Successful Telnet to the POP3 server but unsuccessful telnet to the smtp server is typical of a
port 25 block by the ISP. They often block port 25 to prevent spammers from using home and
unwary business accounts for spam generation. A call to your ISP will usually resolve the
problem quickly. You may have to ask for advanced technical service as this scenario isn’t
on the standard script for call-center type service.