Support for bounce message generation.
| Variable | BOUNCE_FORMAT | Undocumented |
| Function | generateBounce | Generate a bounce message for an undeliverable email message. |
Generate a bounce message for an undeliverable email message.
| Parameters | message | The undeliverable message. (type: a file-like object) |
| failedFrom | The originator of the undeliverable message. (type: bytes or unicode) | |
| failedTo | The destination of the undeliverable message. (type: bytes or unicode) | |
| transcript | An error message to include in the bounce message. (type: bytes or unicode) | |
| encoding | Encoding to use, default: utf-8 (type: str or unicode) | |
| Returns | The originator, the destination and the contents of the bounce message. The destination of the bounce message is the originator of the undeliverable message. (type: 3-tuple of (1) bytes, (2) bytes, (3) bytes) | |