ORA-29278: SMTP transient error: 421 Service not available

ORA-29278: SMTP transient error: 421 Service not available

一般来说，很可能是邮件服务器连接不上

p_conn := utl_smtp.open_connection('xx.xx.xxx.xxx', xxx);

解决方法也很简单，将ip改为正确的邮件服务器ip即可

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