huahuibao/common/config/main-local.php

<?php
return [
    'components' => [
        'mailer' => [
	        'class' => 'yii\swiftmailer\Mailer',
	        'useFileTransport' =>false,//false发送邮件，true只是生成邮件在runtime文件夹下，不发邮件
	        'transport' => [
		        'class' => 'Swift_SmtpTransport',
		        'host' => 'smtp.126.com',  //每种邮箱的host配置不一样
		        'username' => 'zhhinc@126.com',
		        'password' => '',
		        'port' => '25',
		        'encryption' => 'tls',
	        ],
	        'messageConfig'=>[
	        'charset'=>'UTF-8',
	        		'from'=>['zhhinc@126.com'=>'系统邮件']
	        ],
        ],
    ],
];