AWS SES S3处理入站电子邮件

Question

我正在开发一个基于AWS SES的电子邮件发布系统。对于所有收到的电子邮件，我都将路由设置为将消息保存在S3存储桶中，以便异步处理它们。我遇到的问题是，消息以原始格式保存在S3存储桶中：标题、电子邮件正文等，以及加密的附件（一个巨大的字符串）——全部保存在一个文件中。

有没有办法将电子邮件从附件中分离出来，并将其保存在AWS SES级别的单独文件中？我试图直接从AWS获取所需格式的数据，并避免在流程中添加另一个处理步骤。

如果AWS SES不提供这样的功能，那么处理这些消息以获得上述结果的正确方法是什么？

Answer 1

关于如何编写Lambda的问题。这是我们兰姆达的一部分。它的主要功能是parseEvent函数。和数据。事件将为您提供详细信息的记录[0]

exports.handler = function(event, context, callback) {

    var AWS = require('aws-sdk');

    // Validate characteristics of a SES event record.
    if (!event ||
      !event.hasOwnProperty('Records') ||
      event.Records.length !== 1 ||
      event.Records[0].hasOwnProperty('eventSource') ||
      event.Records[0].eventSource !== 'aws:ses' ||
      event.Records[0].eventVersion !== '1.0') {
      callback(null, {'disposition':'STOP_RULE_SET'});      
    }

    email = data.event.Records[0].ses.mail;
    subjectLine = event.Records[0].ses.mail.commonHeaders.subject;
}

关键是事件。记录[0]。塞斯。邮政不幸的是，我无法通过谷歌搜索找到它的结构，我相信我以前见过它。

Answer 2

对于稍后讨论这个问题的人来说，这是从SES调用Lambda函数时得到的JSON结构的链接。

http://docs.aws.amazon.com/ses/latest/DeveloperGuide/receiving-email-notifications-examples.html

花了一些时间才找到那一页；-）

从链接上看，Lambda通知如下所示，

{
"notificationType": "Received",
"receipt": {
    "timestamp": "2015-09-11T20:32:33.936Z",
    "processingTimeMillis": 406,
    "recipients": [
        "[e-mail]"
    ],
    "spamVerdict": {
        "status": "PASS"
    },
    "virusVerdict": {
        "status": "PASS"
    },
    "spfVerdict": {
        "status": "PASS"
    },
    "dkimVerdict": {
        "status": "PASS"
    },
    "action": {
        "type": "S3",
        "topicArn": "arn:aws:sns:us-east-1:012345678912:example-topic",
        "bucketName": "my-S3-bucket",
        "objectKey": "\email"
    }
},
"mail": {
    "timestamp": "2015-09-11T20:32:33.936Z",
    "source": "[e-mail]",
    "messageId": "d6iitobk75ur44p8kdnnp7g2n800",
    "destination": [
        "[e-mail]"
    ],
    "headersTruncated": false,
    "headers": [
        {
            "name": "Return-Path",
            "value": "<[e-mail]>"
        },
        {
            "name": "Received",
            "value": "from a9-183.smtp-out.amazonses.com (a9-183.smtp-out.amazonses.com [54.240.9.183]) by inbound-smtp.us-east-1.amazonaws.com with SMTP id d6iitobk75ur44p8kdnnp7g2n800 for [e-mail]; Fri, 11 Sep 2015 20:32:33 +0000 (UTC)"
        },
        {
            "name": "DKIM-Signature",
            "value": "v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=ug7nbtf4gccmlpwj322ax3p6ow6yfsug; d=amazonses.com; t=1442003552; h=From:To:Subject:MIME-Version:Content-Type:Content-Transfer-Encoding:Date:Message-ID:Feedback-ID; bh=DWr3IOmYWoXCA9ARqGC/UaODfghffiwFNRIb2Mckyt4=; b=p4ukUDSFqhqiub+zPR0DW1kp7oJZakrzupr6LBe6sUuvqpBkig56UzUwc29rFbJF hlX3Ov7DeYVNoN38stqwsF8ivcajXpQsXRC1cW9z8x875J041rClAjV7EGbLmudVpPX 4hHst1XPyX5wmgdHIhmUuh8oZKpVqGi6bHGzzf7g="
        },
        {
            "name": "From",
            "value": "[e-mail]"
        },
        {
            "name": "To",
            "value": "[e-mail]"
        },
        {
            "name": "Subject",
            "value": "Example subject"
        },
        {
            "name": "MIME-Version",
            "value": "1.0"
        },
        {
            "name": "Content-Type",
            "value": "text/plain; charset=UTF-8"
        },
        {
            "name": "Content-Transfer-Encoding",
            "value": "7bit"
        },
        {
            "name": "Date",
            "value": "Fri, 11 Sep 2015 20:32:32 +0000"
        },
        {
            "name": "Message-ID",
            "value": "<[e-mail]>"
        },
        {
            "name": "X-SES-Outgoing",
            "value": "2015.09.11-54.240.9.183"
        },
        {
            "name": "Feedback-ID",
            "value": "1.us-east-1.Krv2FKpFdWV+KUYw3Qd6wcpPJ4Sv/pOPpEPSHn2u2o4=:AmazonSES"
        }
    ],
    "commonHeaders": {
        "returnPath": "[e-mail]",
        "from": [
            "[e-mail]"
        ],
        "date": "Fri, 11 Sep 2015 20:32:32 +0000",
        "to": [
            "[e-mail]"
        ],
        "messageId": "<[e-mail]>",
        "subject": "Example subject"
    }
}
}

Answer 3

看起来不可能让SES自动为你拆分电子邮件。根据这里的留档：

Amazon SES为您提供未经修改的原始电子邮件，通常采用多用途互联网邮件扩展（MIME）格式。

每当SES向S3发送新的电子邮件文件时，我都会使用S3或SNS触发Lambda函数。Lambda函数可以随心所欲地拆分文件，然后将这些新文件写入另一个S3存储桶。