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forwarder.yaml
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forwarder.yaml
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AWSTemplateFormatVersion: '2010-09-09'
Description: 'Cloudformation to forward SES email to another address'
Parameters:
FromAddress:
Description: Email forwarded from address
Type: String
ToAddress:
Description: Email forwarded to address
Type: String
Recipient:
Description: Recipient domains and email addresses that the receipt rule applies to
Type: String
Resources:
SESEmailForwardFunction:
Type: AWS::Lambda::Function
Properties:
Handler: index.handler
Role: !GetAtt SESEmailForwardRole.Arn
Timeout: 30
Environment:
Variables:
from_address: { "Fn::Sub": [ "${FromAddress}", { "FromAddress": {"Ref" : "FromAddress" }} ]}
to_address: { "Fn::Sub": [ "${ToAddress}", { "ToAddress": {"Ref" : "ToAddress" }} ]}
Code:
ZipFile: !Sub |
var AWS = require('aws-sdk');
var forwardFrom = process.env.from_address;
var forwardTo = process.env.to_address;
exports.handler = function(event, context) {
var msgInfo = JSON.parse(event.Records[0].Sns.Message);
// don't process spam messages
if (msgInfo.receipt.spamVerdict.status === 'FAIL' || msgInfo.receipt.virusVerdict.status === 'FAIL') {
console.log('Message is spam or contains virus, ignoring.');
context.succeed();
}
console.log('Msg');
console.log(msgInfo);
var email = msgInfo.content, headers = "From: "+forwardFrom+"\r\n";
headers += "Reply-To: "+msgInfo.mail.commonHeaders.from[0]+"\r\n";
headers += "X-Original-To: "+msgInfo.mail.commonHeaders.to[0]+"\r\n";
headers += "To: "+forwardTo+"\r\n";
headers += "Subject: Fwd: "+msgInfo.mail.commonHeaders.subject+"\r\n";
if (email) {
var res;
res = email.match(/Content-Type:.+\s*boundary.*/);
if (res) {
headers += res[0]+"\r\n";
}
else {
res = email.match(/^Content-Type:(.*)/m);
if (res) {
headers += res[0]+"\r\n";
}
}
res = email.match(/^Content-Transfer-Encoding:(.*)/m);
if (res) {
headers += res[0]+"\r\n";
}
res = email.match(/^MIME-Version:(.*)/m);
if (res) {
headers += res[0]+"\r\n";
}
var splitEmail = email.split("\r\n\r\n");
splitEmail.shift();
email = headers+"\r\n"+splitEmail.join("\r\n\r\n");
}
else {
email = headers+"\r\n"+"Empty email";
}
new AWS.SES().sendRawEmail({
RawMessage: { Data: email }
}, function(err, data) {
if (err) context.fail(err);
else {
console.log('Sent with MessageId: ' + data.MessageId);
context.succeed();
}
});
}
Runtime: nodejs12.x
SNSEmailReceiveTopic:
Type: AWS::SNS::Topic
Properties:
Subscription:
- Endpoint:
!GetAtt SESEmailForwardFunction.Arn
Protocol: lambda
SESEmailForwardRole:
Type: AWS::IAM::Role
Properties:
AssumeRolePolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Principal:
Service:
- lambda.amazonaws.com
Action:
- sts:AssumeRole
Path: "/"
Policies:
- PolicyName: SESEmailForward
PolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Action:
- logs:CreateLogGroup
- logs:CreateLogStream
- logs:PutLogEvents
Resource: arn:aws:logs:*:*:*
- Effect: Allow
Action:
- ses:SendEmail
- ses:SendRawEmail
Resource: "*"
SNSLambdaInvokeRole:
Type: AWS::Lambda::Permission
Properties:
Action: lambda:InvokeFunction
Principal: sns.amazonaws.com
SourceArn:
Ref: SNSEmailReceiveTopic
FunctionName:
!GetAtt SESEmailForwardFunction.Arn
SESEmailForwardRuleSet:
Type: AWS::SES::ReceiptRuleSet
SESEmailForwardRule:
Type: AWS::SES::ReceiptRule
Properties:
RuleSetName: !Ref SESEmailForwardRuleSet
Rule:
Enabled: true
ScanEnabled: true
Recipients:
- Ref: Recipient
Actions:
- SNSAction:
Encoding: UTF-8
TopicArn: !Ref SNSEmailReceiveTopic
Outputs:
LambdaFunction:
Value: { Ref : SESEmailForwardFunction }