On Sat, 23 Jul 2022 14:14:48 -0400 Pierre Fortin <pf at pfortin.com> wrote: > .quote() encodes (CM doesn't treat as a link) > .unquote() decodes (CM thinks the link ends at the first space) A link does end at the first (unencoded) space. You need to use quote_plus() instead of quote() and there's nothing that needs to change in Claws Mail. with regards Paul