我使用 utl_mail.send 发起了一封电子邮件
begin
utl_mail.send(
sender => <<sender mail>>,
recipients => <<recipient mail>>,
message => 'Hello World'
);
commit;
end;
/
但是，邮件不会发送给收件人，而是保留在 inetpub/mailroot/queue 中。
我们验证了所有 smtp 服务器设置并且看起来不错。 我们看到端口 25 也打开了。 另外，我们停止了 smtp，清除了队列，然后重新启动了 smtp。问题还是没有解决。
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提前致谢， 分部
【问题讨论】：
我在 Server 2019 上遇到了同样的问题。我的问题是从客户端发送时使用的“发件人电子邮件地址”与 SMTP 服务器上的设置不匹配。一旦客户端使用正确的“发件人电子邮件地址”开始发送，邮件就不再停留在队列中。
【讨论】：
我最近在服务器 2016 上遇到了同样的问题。使用 IIS6 管理器配置了 SMTP。事实证明，SMTP 也必须在 IIS 中正确配置。基本上，我从 IIS 服务器节点中选择了 SMTP，输入了我的 smtp 服务器的凭据并保存了它。卡在队列文件夹中的项目立即开始交付。不知道为什么这是必要的，因为我是从控制台应用程序访问中继，但解决方案确实有效。
【讨论】：
检查事件查看器是否有任何日志
【讨论】：
使用 telnet 尝试通过发送一封非常简单的电子邮件来确认一切正常。感谢 wiki (http://www.askstudent.com/techtips/how-to-use-telnet-to-send-email-over-port-25-using-smtp/) 的说明：
Step # 1: First, open a command prompt. To open a command prompt window, click Start, Run and then type in cmd and press Enter. You can also press the +R to open the Run prompt and then type in cmd in the open text box.
Step # 2: You need to know a remote mail server. If you are still in school or working, there is the excellent opportunity to use your University mail server or your company’s mail server for this.
type in telnet RemoteMailServer 25 at the command prompt. The Remote mail server here in this command is the mail server of your school or company. It is usually mailhost..edu or compmail..com or something on those lines. When you press enter, you are shown a quick prompt that you are connecting to the remote mail server.
Step # 3: Introduce yourself to the mail server. Play around a bit.
type in helo mailhost at the command prompt. The mail server responds back with something like this
250 RemoteMailHost. Hello , pleased to meet you.
Step # 4: You can now enter your email address.
type in mail from: your email id @ blah.com
The mail server responds back with a 250 … sender ok
Step # 5: You can now enter your receipient’s email address
type in rcpt to: recipient email id @ blah.com
The mail server responds back with a “Recipient OK” message
Step # 6: Now, you are ready to type in the body of the email message.
type in data and press enter.
Now, type your message and then finally press Enter. To end your message type in a single period “.” . Your message is now in the queue
Step # 7: To complete and finish the process, type in quit and press enter. The mail server responds with a “Bye” after which you see a “Connection to host lost” message displaye
【讨论】：