Sending email via AWS SES within AWS Lambda function

Question

I have created a very basic simple function on AWS Lambda which will be used to accept form submissions.

I am trying to use AWS SES in order to do this. I have setup the SES service etc, and verified the account I wish to send to and have been able to send out a test email. All works!!

I don't get an error or anything.

Or even just using the node.js aws sdk would more than likely be helpful.

var aws = require('aws-sdk');
var ses = new aws.SES({
   accessKeyId: 'myAccessKey',
   secretAccesskey: 'mySecretKey',
   region: 'eu-west-1' 
});

exports.handler = function(event, context) {
    console.log("Incoming: ", event);
    var output = querystring.parse(event);

    var eParams = {
        Destination: {
            ToAddresses: ["toAddress@email.com"]
        },
        Message: {
            Body: {
                Text: {
                    Data: output.Key1
                }
            },
            Subject: {
                Data: "Ses Test Email"
            }
        },
        Source: "mysource@source.com"
    };

    console.log('===SENDING EMAIL===');
    var email = ses.sendEmail(eParams, function(err, data){
        if(err) console.log(err);
        else {
            console.log("===EMAIL SENT===");
            console.log(data);
        }
    });
    console.log("EMAIL CODE END");
    console.log('EMAIL: ', email);
    context.succeed(event);
};

Answer 1

It would appear that I had the context.succeed(event) placed in the wrong area of code.

Once I moved it into the sendEmail callback all worked.

var aws = require('aws-sdk');
var ses = new aws.SES({
  accessKeyId: 'myAccessKey',
  secretAccesskey: 'mySecretKey',
  region: 'eu-west-1' 
});

exports.handler = function(event, context) {
  console.log("Incoming: ", event);
  var output = querystring.parse(event);

  var eParams = {
    Destination: {
        ToAddresses: ["toAddress@email.com"]
    },
    Message: {
        Body: {
            Text: {
                Data: output.Key1
            }
        },
        Subject: {
            Data: "Ses Test Email"
        }
    },
    Source: "mysource@source.com"
};

console.log('===SENDING EMAIL===');
var email = ses.sendEmail(eParams, function(err, data){
    if(err) {
       console.log(err);
       context.fail(err);
    } else {
        console.log("===EMAIL SENT===");
        console.log("EMAIL CODE END");
        console.log('EMAIL: ', email);
        console.log(data);
        context.succeed(event);
    }
});};

Answer 2

This is because Lambda freezes the container when the function exits and any async processes are frozen, such as your email. This is especially true with Node. See Lambda Programming Model. http://docs.aws.amazon.com/lambda/latest/dg/lambda-introduction.html

Answer 3

My case is: when you set VPC, the issue happens cause of internet limitation access.

If you remove VPC, everything works fine.

It seems a AWS bug for me.

I opened today a AWS Support for it.

No anwers yet.

Answer 4

var aws = require("aws-sdk");
var ses = new aws.SES({ region: "us-west-2" });
exports.handler = async function (event) {
  var params = {
    Destination: {
      ToAddresses: ["RecipientEmailAddress", ...],
    },
    Message: {
      Body: {
        Text: { Data: "Test" },
      },

      Subject: { Data: "Test Email" },
    },
    Source: "SourceEmailAddress",
  };

  return ses.sendEmail(params).promise()
};