The 10.10.5 hotfix release adds an improvement to the email center that allows for the storing of click tracking links in the database. This allows links in emails to be shorter, alleviating a problem with some older email clients and long links. It also allows clearer reporting on links in email logs and statistics. To enable this feature, use settings.features.emailLinkShortener.enabled = true in your Config.
[PRESIDECMS-1383] - Email link tracking: long tracking links can lead to broken links in some old email clients
[PRESIDECMS-1384] - Data export: allow properties to specifiy specific data export renderer