kumomta/docs/reference/message/recipient.md

recipient

message:recipient()

Returns the envelope recipient of the message. The return value is an EnvelopeAddress

See also message:sender.

Recipient List

{{since('2025.12.02-67ee9e96')}}

If the message is part of an SMTP batch with more than a single recipient then this method can return an array style table holding one EnvelopeAddress for each recipient.

If you'd rather always deal with a list of recipients, even if there is just a single recipient, then you can use message:recipient_list.