Send mail on actionCreate - yii2

Question

I have a system that works by the intranet and I would like to know how best to send an alert email in actionCreate?
I did as below, the email is sent correctly, but if the internet is offline an unfriendly error message appears.
public function actionCreate()
{
$model = new Todolist();
if ($model->load(Yii::$app->request->post())) {
$file = $model->uploadImage();
if ($model->save()) {
if ($file !== false) {
$idfolder = Yii::$app->user->identity->id;
if(!is_dir(\Yii::$app->getModule('task')->params['taskAttachment'])){
mkdir(\Yii::$app->getModule('task')->params['taskAttachment'], 0777, true);
}
$path = $model->getImageFile();
$file->saveAs($path);
}
Yii::$app->session->setFlash("task-success", "Atividade incluída com sucesso!");
\Yii::$app->mailer->compose('#app/mail/task')
->setFrom('intranet#sicoobcrediriodoce.com.br')
->setTo($model->responsible->email)
->setSubject(Yii::$app->params['appname'].' - '.\Yii::$app->getModule('task')->params['taskModuleName']. ' - Nova Tarefa : #'. $model->id)
->send();
return $this->redirect(['index']);
} else {
// error in saving model
}
}
return $this->render('create', [
'model' => $model,
]);
}

Answer 1

Try this (don't save model if email not sended)
public function actionCreate()
{
$model = new Todolist();
if ($model->load(Yii::$app->request->post())) {
$file = $model->uploadImage();
$transaction = $model->getDb()->beginTransaction();
try{
if ($model->save()) {
if ($file !== false) {
$idfolder = Yii::$app->user->identity->id;
if(!is_dir(\Yii::$app->getModule('task')->params['taskAttachment'])){
mkdir(\Yii::$app->getModule('task')->params['taskAttachment'], 0777, true);
}
$path = $model->getImageFile();
$file->saveAs($path);
}
Yii::$app->session->setFlash("task-success", "Atividade incluída com sucesso!");
\Yii::$app->mailer->compose('#app/mail/task')
->setFrom('intranet#sicoobcrediriodoce.com.br')
->setTo($model->responsible->email)
->setSubject(Yii::$app->params['appname'].' - '.\Yii::$app->getModule('task')->params['taskModuleName']. ' - Nova Tarefa : #'. $model->id)
->send();
return $this->redirect(['index']);
}
}
catch(Exception $e)
{
$transaction->rollBack();
throwe $e;
//unlik savedFile if exist
}
}
return $this->render('create', [
'model' => $model,
]);
}
or use mail queue to save mail in databases and send via cron