When you enable click-tracking for email sent through Mandrill, tracking information is added to any link in your HTML content that is enclosed in HTML link tags.
Link-tracking is not added to the following types of links:
- 'Mailto:' and email address links.
- Long links: Some internet browsers and email clients break links over a certain length. If Mandrill detects that adding tracking information could create links too long for these email programs and browsers, tracking data is not added. If the link is really long link, check to see if you can shorten it before putting it in your Mandrill email so Mandrill tracking can be added.
If you are still having issues with links not being tracked, verify that click-tracking disabled. You can set global send settings that apply by default for all emails, but if the API call or SMTP headers have click-tracking disabled, this will override the account settings.