kumomta/docs/reference/headermap/set_content_disposition.md

set_content_disposition

headers:set_content_disposition(VALUE)

{{since('2025.10.06-5ec871ab')}}

Assign the VALUE to the Content-Disposition header.

VALUE may be either a string or be an MimeParams.

If you assign using a string, the string will be parsed and validated as being compatible with MimeParams before allowing the assigment to proceed.