Link Unshortener is updated today in the Mac App Store. Link Unshortener expands shortened web links, following redirects until it reveals the destination URL, and it allows you to open the destination URL in any web browser.
In version 10.5, Link Unshortener now has special handling for Reddit email links, automatically turning click.redditmail.com URLs into www.reddit.com URLs, without the intermediate steps and without all the tracking parameters at the end! If you make Link Unshortener your default web browser, then it can handle links like these from your email client.
You can take advantage of the StopTheMadness Link Unshortener Bundle to get both apps for a discount, and complete the bundle if you already have one of the two!