Do any of you ever run into clients getting emails with broken links that are fully functional otherwise? We have an issue where we are hearing back that links are broken, but all links are 100% working in all tests, as well as working for 80-90% of our sends. I've read that this can be an Outlook issue, but I wanted to reach out to see if anyone had any wisdom to offer on this topic.

Note: Absolute paths are always used.