On Mon, 22 Feb 2021 at 14:01, Vasilii Kolobkov <vasilii at orangeshoelaces.net> wrote: > > The specification has URLs for link lines. Is that an intentional > choice over a broader URI category? > Whilst the spec says URLs, people do put URIs such as `mailto:` in links occasionally, and it's often supported. Whether it's international or not I don't know.