re :For some reason all my links come out like this

Mandrill is a paid Mailchimp add-on. You would have to have a Mailchimp account. MailChimp is a web-based email marketing service used to send bulk mail.

Do you have/had a MailChimp account and do you use/used Mandrill?

Are you talking about links you create in a new email ? Are you talking about links you created and put in a template email, but you now need the link removed? Are you talking about emails you receive that contain that link?

Please tell the forum exactly what you are doing, what you select and what you type etc and provide some images to help explain the process.

Oh i see what's happening. A few of the services connected to Mailchimp from suppliers are adding that on their links and it's unrelated to Thunderbird itself.

Thanks for the quick reply!