利用utl_smtp发送邮件的时候，会出现如下错误，具体方法如下：

ORA-20001: The send mail was error

ORA-24247: network access denied by access control list(ACL)

解决方法如下：

BEGIN

DBMS_NETWORK_ACL_ADMIN.CREATE_ACL (

acl          => 'email_server_permissions.xml',

description  => 'Enables network permissions for the e-mail server',

principal    => 'MON',

is_grant     => TRUE,

privilege    => 'connect');

END;

/

BEGIN

DBMS_NETWORK_ACL_ADMIN.assign_acl (

acl         => 'email_server_permissions.xml',

host        => 'smtp.xxxxx.com', --SMTP服务器地址

lower_port  => 25,

upper_port  => NULL);

COMMIT;

END;

/

SELECT host, lower_port, upper_port, acl FROM dba_network_acls;

SELECT acl,principal, privilege, is_grant, TO_CHAR(start_date, 'DD-MON-YYYY') AS start_date, TO_CHAR(end_date, 'DD-MON-YYYY') AS end_date

FROM dba_network_acl_privileges;

BEGIN

DBMS_NETWORK_ACL_ADMIN.drop_acl(acl => 'email_server_permissions.xml');

COMMIT;

END;

/

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