Yii2 SwiftMailer发送邮件两次

Question

I write a game for football fans. So, I have to send similar mails to a group of people (not completely duplicated e-mail copies). When I send the mails in a cycle - Yii framework sends the mails twice. I suppose - it is because of the static variable Yii::$app. Can someone give me a hint, please. A code for example.

foreach ($oRace->user as $currUser) {
        $htmlContent = $this->renderPartial('start_race', ['oRace' => $oRace]);
        Yii::$app->mailer->compose()
                ->setFrom('[e-mail]')
                ->setTo($currUser->mail)
                ->setSubject('Race "' . $raceName . '" has Started')
                ->setHtmlBody($htmlContent)
                ->send();
    }

Thanks all in advance!

My Mailer config.

    'mailer' => [
        'class' => 'yii\swiftmailer\Mailer',
        'useFileTransport' => false,
        'transport' => [
            'class' => 'Swift_SmtpTransport',
            'host' => 'mail.example.eu',
            'username' => '[e-mail]',
            'password' => 'password',
            'port' => '587',
            'encryption' => 'TLS',
        ]
    ],

One more thing. The last mail in the cycle is never duplicated (only the last).

Another failed option. Yii::$app->mailer->sendMultiple($allMails);

Answer 1

From the provided code snippets, there are 3 possible reasons for that. Either:

• $oRace->user contains every user twice
• $currUser->mail contains the email twice like `[e-mail];[e-mail]"
• something is wrong inside the send function of SwiftMailer