Since PoliteMail knows what special characters it can or cannot support, add auto %encoding in embedded and tracked links to automatically replace a ' to a %27.
If this is not possible, then I suggest adding a warning if a link does contain a special character that is not supported by tracking to notify the user that the URL will not work after being sent.
This is resolved in 5.0.
Hi, Alexander! We are looking into this. Thanks for bringing it to our attention!