I run a windows client for TZO that updates the IP. My IP does not change very frecuent (only when I turn the modem off). The incoming and Outgoing mail is working so the IP should be correct. I had to change the files attribute because it did not have rights to a subdirectory and the web pages did not work.
I change the server 2 days ago and the previus ver (4.0.1) was working perfect and is basically the same setup.
I do not why but the upgrade part in 4.1.1 does not work and I have not seen anyone complaining about it. We have two esmith server and I could not upgrade them.