EVENT_BEFORE_SEND event of type yii\mail\MailEvent
An event raised right before send. You may set yii\mail\MailEvent::$isValid to be false to cancel the send.
EVENT_BEFORE_SEND event of type yii\mail\MailEvent
An event raised right before send. You may set yii\mail\MailEvent::$isValid to be false to cancel the send.
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