We have a number of reports from our clients about problems with link tracking in emails
(see http://help.wildapricot.com/display/DOC/Tracking+link+click-throughs )
It looks like this feature is malfunctioning for a number of clients.
We are investigating this and will release a fix as soon as we can - but for now we advise to refrain from using link tracking feature.
Dmitry Buterin, Chief Apricot