kumomta/docs/reference/message/set_recipient.md

message:set_recipient(ENVELOPE)

{{since('2023.08.22-4d895015')}}

Sets the envelope recipient of the message. The value can be an EnvelopeAddress or a string that can be parsed into an EnvelopeAddress.

message:set_recipient 'someone.else@example.com'

See also message:set_sender.