Hello Carlos, I'm sorry to hear you're having issues with this. Is it possible your browser might be auto-filling the old password before you save the changes? Try logging in to SmarterTrack from a guest or incognito session in your browser then update the POP/SMTP details from there and see if the same issue happens. Let me know how it goes :)
Kyle Kerst
System/Network Administrator
SmarterTools Inc.
(877) 357-6278
www.smartertools.com