initial version

.env.sample

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+FORWARD_EMAIL=""
+EMAIL_BUCKET=""
+EMAIL_BUCKET_PREFIX=""
+
+# needed only for deployment
+AWS_REGION=""
+LAMBDA_FUNCTION_NAME=""

.gitignore

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+node_modules
+package-lock.json
+dist/
+dist.zip
+archive.zip
+.env
+.env.production

.prettierrc

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+{
+    "semi": false,
+    "singleQuote": true,
+    "trailingComma": "none"
+}

README.md

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+# aws-email-forwarder
+
+> Serverless email forwarding service with AWS Lambda and Simple Email Service, built and deployed with gulp. Extending from [arithmetric/aws-lambda-ses-forwarder](https://github.com/arithmetric/aws-lambda-ses-forwarder).
+
+## Usage
+
+```bash
+npm i
+
+# fill in environment variables
+cp .env.sample .env
+
+# package and deploy
+gulp
+```
+
+## Setup
+
+Follow initial AWS setup instructions on [arithmetric/aws-lambda-ses-forwarder](https://github.com/arithmetric/aws-lambda-ses-forwarder).

gulpfile.js

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+const fs = require('fs')
+const gulp = require('gulp')
+const del = require('del')
+const install = require('gulp-install')
+const zip = require('gulp-zip')
+const AWS = require('aws-sdk')
+
+require('dotenv').config()
+
+const clean = del.bind(null, ['dist/**/*', 'dist.zip'])
+
+const js = done => {
+  gulp.src('index.js').pipe(gulp.dest('dist'))
+  done()
+}
+
+const npm = done => {
+  gulp
+    .src('package.json')
+    .pipe(gulp.dest('dist'))
+    .pipe(install({ production: true }, () => done()))
+}
+
+const env = done => {
+  gulp.src('.env').pipe(gulp.dest('dist'))
+  done()
+}
+
+const package = done => {
+  gulp
+    .src('dist/**/*')
+    .pipe(zip('dist.zip'))
+    .pipe(gulp.dest('.'))
+  done()
+}
+
+const upload = done => {
+  AWS.config.region = process.env.AWS_REGION
+  const lambda = new AWS.Lambda()
+  const functionName = process.env.LAMBDA_FUNCTION_NAME
+
+  lambda.getFunction({ FunctionName: functionName }, (err, data) => {
+    if (err) {
+      if (err.statusCode === 404) {
+        let warning = 'Unable to find lambda function ' + deploy_function + '. '
+        warning += 'Verify the lambda function name and AWS region are correct.'
+        console.log(warning)
+      } else {
+        let warning = 'AWS API request failed. '
+        warning += 'Check your AWS credentials and permissions.'
+        console.log(warning)
+      }
+    }
+
+    const paramsCode = {
+      FunctionName: functionName
+    }
+
+    const paramsConfig = {
+      FunctionName: functionName,
+      Environment: {
+        Variables: {
+          FORWARD_EMAIL: process.env.FORWARD_EMAIL,
+          EMAIL_BUCKET: process.env.EMAIL_BUCKET,
+          EMAIL_BUCKET_PREFIX: process.env.EMAIL_BUCKET_PREFIX
+        }
+      }
+    }
+
+    fs.readFile('dist.zip', (err, data) => {
+      if (err) console.log(err)
+
+      paramsCode['ZipFile'] = data
+
+      lambda.updateFunctionCode(paramsCode, (err, data) => {
+        if (err) console.log(err)
+
+        lambda.updateFunctionConfiguration(paramsConfig, (err, data) => {
+          if (err) console.log(err)
+
+          done()
+        })
+      })
+    })
+  })
+}
+
+gulp.task('default', gulp.series(clean, js, env, npm, package))
+
+gulp.task('deploy', upload)

index.js

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+var LambdaForwarder = require('aws-lambda-ses-forwarder')
+
+require('dotenv').config()
+
+exports.handler = function(event, context, callback) {
+  const overrides = {
+    config: {
+      // fromEmail: "noreply@example.com",
+      subjectPrefix: '',
+      emailBucket: process.env.EMAIL_BUCKET,
+      emailKeyPrefix: process.env.EMAIL_BUCKET_PREFIX,
+      forwardMapping: {
+        desk: [process.env.FORWARD_EMAIL],
+        hi: [process.env.FORWARD_EMAIL]
+      }
+    }
+  }
+
+  LambdaForwarder.handler(event, context, callback, overrides)
+}

package.json

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+{
+  "name": "aws-email-forwarder",
+  "version": "1.0.0",
+  "description": "Serverless email forwarding service with AWS Lambda and Simple Email Service. Built and deployed with gulp.",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "Matthias Kretschmamnn <m@kretschmann.io> (https://matthiaskretschmann.com/)",
+  "license": "MIT",
+  "dependencies": {
+    "aws-lambda-ses-forwarder": "^4.2.0",
+    "dotenv": "^6.2.0"
+  },
+  "devDependencies": {
+    "aws-sdk": "^2.382.0",
+    "del": "^3.0.0",
+    "gulp": "^4.0.0",
+    "gulp-install": "^1.1.0",
+    "gulp-zip": "^4.2.0",
+    "prettier": "^1.15.3"
+  }
+}