This is quite a specific question and can probably only be answered by a plusnet techy, I've programmed an arduino to extract the external ip address from an email header and then email that ip address to me if it changes, my question is, is there an acceptable usage limit to the number of times in a certain period I can hit the plusnet mail server for this information, at the moment it's set to check every hour, but I could conceivably set it to check ever 5 minutes.
