问题描述
我正在使用ruby的Net :: IMAP对象，并且可以使用以下任一方法检索一组电子邮件：
I am using ruby's Net::IMAP object and I can retrieve a set of emails using either:
IMAP.all ..args..
或
IMAP.find ..args..
但是仍然存在最好通过例如message-id标头来检索特定电子邮件？
But is there anyway of retrieving a specific email, preferably by the message-id header for example?
这是否可能，或者我是否仅限于全部和查找并尝试使用更好的参数来缩小结果集？
Is this possible or am I limited to all and find and trying to narrow the result set with better arguments?
推荐答案
我不了解您在IMAP中使用什么技术。但是，提供了按各种字段（包括电子邮件标题）进行搜索的功能。您可以使用以下IMAP命令来检索具有Message-Id < [email protected]> 的电子邮件的UID：
I didn't understand what technology you're using with IMAP. However the IMAP Specification provides the ability to search by a variety of fields, including email headers. You can use the following IMAP command to retrieve the UID of an email with Message-Id <[email protected]>:
0005 UID SEARCH HEADER Message-ID <[email protected]>
然后，您将获得如下响应：
This will then give you a response such as the following:
* SEARCH 1
0005 OK UID completed
在我的情况下，具有Message-Id < [email protected]> 的电子邮件是第一封电子邮件，因此SEARCH命令返回了匹配的UID的 1 。
In my case the email with Message-Id <[email protected]> was the first one, so the SEARCH command returned a matching UID of 1.
然后您可以使用 UID FETCH 命令，例如：
You can then retrieve the message using a UID FETCH command, such as the following:
0006 UID FETCH 1 BODY[]
当然，如果您事先知道UID，则可以跳过 UID搜索步骤，但这取决于您的应用程序。
Naturally, if you know the UID in advance, you can skip the UID SEARCH step, but that depends on your application.
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