Error: Error: Expected Response Code 354 But Got Code “503”, with message “503 Bad Sequence of Commands[@sm190202]”
1. Error: Error: Expected Response Code 354 But Got Code “503”, with message “503 Bad Sequence of Commands”[@sm190202]” . As shown in Figure 1
![发送邮件时报错：Error: Expected response code 354 but got code "503", with message "503 Bad sequence of commands [@sm190202]"](https://www.shuijingwanwq.com/wp-content/uploads/2025/06/1-11.jpg)
Figure 1
PS C:\wwwroot\object\src> ./yii convention-registration-image/send-email-from-free-ticket -cid=1826937119386045 -t=shuijingwanwq@163.com
C:\wwwroot\object\src/console/tmp/1826937119386045/上传图片/姓名_1831248803312775.jpeg success
命令 convention-registration-image/export-from-free-ticket 执行成功
C:\wwwroot\object\src\console\tmp\1826937119386045\上传图片\姓名_1831248803312775.jpeg
上传图片/姓名_1831248803312775.jpeg
✅ 打包成功：C:\wwwroot\object\src/console/tmp/1826937119386045.zip
命令 zip/create 执行成功
Error: Expected response code 354 but got code "503", with message "503 Bad sequence of commands [@sm190202]
"
命令 email/send 执行失败，退出码：1
2. SMTP rejects the preparation steps before the data command. This is a common specific trigger point for 503, usually caused by missing or errors in rcpt to . Make sure that $this->to you set is a legitimate, existing email address, not an empty array or a format error. Add “” to the sent mailbox. No more errors. as shown in Figure 2
Figure 2
PS C:\wwwroot\object\src> ./yii convention-registration-image/send-email-from-free-ticket -cid=1826937119386045 -t="shuijingwanwq@163.com"
C:\wwwroot\object\src/console/tmp/1826937119386045/上传图片/姓名_1831248803312775.jpeg success
命令 convention-registration-image/export-from-free-ticket 执行成功
C:\wwwroot\object\src\console\tmp\1826937119386045\上传图片\姓名_1831248803312775.jpeg
上传图片/姓名_1831248803312775.jpeg
✅ 打包成功：C:\wwwroot\object\src/console/tmp/1826937119386045.zip
命令 zip/create 执行成功
电子邮件发送成功
命令 email/send 执行成功
