set_resent_sender
Since: Dev Builds Only
The functionality described in this section requires a dev build of KumoMTA. You can obtain a dev build by following the instructions in the Installation section.
Assign VALUE to the Resent-Sender header.
VALUE may be either a string or a Mailbox.
If you assign using a string, the string will be parsed and validated as being compatible with Mailbox before allowing the assigment to proceed.