When I send a web link via Thunderbird, it changes some of the characters in the link text so that it won't open the correct page. Example: I send the web address https://musicforsport.sourceaudio.com/#!composer?id=1453710 to myself. When I receive the email, the link looks correct- and now shows as a link, i.e. underlined- and the web address in the search bar at the bottom of the email shows the correct address i.e. https://musicforsport.sourceaudio.com/#!composer?id=1453710 However when I click on the link it takes me to here https://musicforsport.sourceaudio.com/#!explorer and when I examine the link- by 'replying' to the email, to allow me to edit it, then highlighting the link text and hitting the insert link button- I can see that the link has actually been changed to https://musicforsport.sourceaudio.com/#%21composer?id=1453710 So in the course of sending the email, Thunderbird has corrupted the exclamation in the link text to %21. I'm assuming this is some problem with encoding but haven't been able to resolve it. ( The encoding on outgoing and incoming emails is set to UTF-8.) Any advice very gratefully received!