503 AUTH command used when not advertised

发邮件记录错误信息：

Send command:HELO sendmail ,expected code:250
response:250 z.rockpie.com Hello sendmail [104.238.198.103]

Send command:AUTH LOGIN ,expected code:334
response:503 AUTH command used when not advertised

Error:503 AUTH command used when not advertised|**| command:

解决方法：HELO改为EHLO

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