Issue: When a tracked link is clicked on, an 'invalid URL' error appears.
Explanation: When a link is tracked, the link URL is changed so it first directs to a tracking server to register the link click before redirecting you to the actual destination website (in the case of Mailtrack it changes to https://mailtrack.io/trace/link/....).
If you are using a personalized URL (that has Google Analytics tags for example) or a URL that contains special characters then this can, unfortunately, cause problems when changing the URL so that it can be tracked, and you may receive an 'invalid URL' error.
To avoid receiving this error it's best to keep the personalization to a minimum and make sure any special characters in the URL are encoded e.g. if the URL contains the letter ç it should be changed to %C3%A7.
Learn more about Mailtrack's link tracking feature: https://mailtrack.io/hc/en-us/articles/360005941137-Click-tracking