| public setInReplyTo ( string $inReplyTo, array $references = [] ) : self | ||
| $inReplyTo | string | Message Id |
| $references | array | Previous mail references |
| return | self | |
public function setInReplyTo(string $inReplyTo, array $references = []) : self
{
$this->inReplyTo = $inReplyTo;
$this->references = $references;
return $this;
}