When you send messages with Mailpro credits, we replace your image and redirection link URLs with tracking URLs that enable you to retrieve the information on your statistics (opening rate, click rate, etc. …).
Your message should absolutely contain links without any special characters (é, à, è, @, ~, ?, =, %, …) and without spaces.
Example : http://www.monsite.com/mon_dossier/ma-page.html
If your link contains accents or special characters, we advise you to use a website to convert your links, into a shorter link that redirects your clients to the same page.