It might help to link to the old discussion:

[id://11155744] -> Send email with recipient name

From How to link which is always listed in the help section below the post form:

Linking to a specific node by node_id:

Now you can link to a specific node_id by using [id://979] which will make a link like vroom. You can also follow it up with link text that you want to use in place of the node title like so [id://131|The Default Page] whic creates a link like so: The Default Page