Checking that all links go to the right places before sending an email is cumbersome in Thunderbird. The nonclickable nature of links entered during message composition is explained as a deliberate choice by the developers so that it is easier to engage in microediting of links to, for example, correct a spelling error in a link (say, "https://heresamisspelledlinke.com"). Perhaps this choice aids the workflow of some users who type URLs. It is quite a bit different experience for those of us who send out numerous emails with hyperlinked text that we've copied from another document (the URL itself is not even visible). For those instances when we need to correct a spelling error in manually entered URL, other mail programs allow a click on a link icon (or an unlink icon) to undo the automatic hyperlink and allow editing. A second click restores the hyperlinking. This seems much better behavior to me. LInk checking is very important to those of us who send out mission critical communications to groups. In the competition between ease of correcting spelling error and ease of checking links when composing an email, I vote for leaning towards ease of link-checking. Is it possible to make it an option for those of us who want clickable links while we are composing an email?