Initial commit

node_modules/smtp-server/examples/server.js

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+/* eslint no-console: 0 */
+
+'use strict';
+
+// Replace '../lib/smtp-server' with 'smtp-server' when running this script outside this directory
+const SMTPServer = require('../lib/smtp-server').SMTPServer;
+
+const SERVER_PORT = 2525;
+const SERVER_HOST = false;
+
+// Connect to this example server by running
+//   telnet localhost 2525
+// or
+//   nc -c localhost 2525
+
+// Authenticate with this command (username is 'testuser' and password is 'testpass')
+//   AUTH PLAIN dGVzdHVzZXIAdGVzdHVzZXIAdGVzdHBhc3M=
+
+// Setup server
+const server = new SMTPServer({
+    // log to console
+    logger: true,
+    secure: true,
+
+    // not required but nice-to-have
+    banner: 'Welcome to My Awesome SMTP Server',
+
+    // disable STARTTLS to allow authentication in clear text mode
+    disabledCommands: ['AUTH', 'STARTTLS'],
+
+    // By default only PLAIN and LOGIN are enabled
+    authMethods: ['PLAIN', 'LOGIN', 'CRAM-MD5'],
+
+    // Accept messages up to 10 MB
+    size: 10 * 1024 * 1024,
+
+    // allow overriding connection properties. Only makes sense behind proxy
+    useXClient: true,
+
+    hidePIPELINING: true,
+
+    // use logging of proxied client data. Only makes sense behind proxy
+    useXForward: true,
+
+    // Setup authentication
+    // Allow only users with username 'testuser' and password 'testpass'
+    onAuth(auth, session, callback) {
+        let username = 'testuser';
+        let password = 'testpass';
+
+        // check username and password
+        if (
+            auth.username === username &&
+            (auth.method === 'CRAM-MD5'
+                ? auth.validatePassword(password) // if cram-md5, validate challenge response
+                : auth.password === password) // for other methods match plaintext passwords
+        ) {
+            return callback(null, {
+                user: 'userdata' // value could be an user id, or an user object etc. This value can be accessed from session.user afterwards
+            });
+        }
+
+        return callback(new Error('Authentication failed'));
+    },
+
+    // Validate MAIL FROM envelope address. Example allows all addresses that do not start with 'deny'
+    // If this method is not set, all addresses are allowed
+    onMailFrom(address, session, callback) {
+        if (/^deny/i.test(address.address)) {
+            return callback(new Error('Not accepted'));
+        }
+        callback();
+    },
+
+    // Validate RCPT TO envelope address. Example allows all addresses that do not start with 'deny'
+    // If this method is not set, all addresses are allowed
+    onRcptTo(address, session, callback) {
+        let err;
+
+        if (/^deny/i.test(address.address)) {
+            return callback(new Error('Not accepted'));
+        }
+
+        // Reject messages larger than 100 bytes to an over-quota user
+        if (address.address.toLowerCase() === 'almost-full@example.com' && Number(session.envelope.mailFrom.args.SIZE) > 100) {
+            err = new Error('Insufficient channel storage: ' + address.address);
+            err.responseCode = 452;
+            return callback(err);
+        }
+
+        callback();
+    },
+
+    // Handle message stream
+    onData(stream, session, callback) {
+        stream.pipe(process.stdout);
+        stream.on('end', () => {
+            let err;
+            if (stream.sizeExceeded) {
+                err = new Error('Error: message exceeds fixed maximum message size 10 MB');
+                err.responseCode = 552;
+                return callback(err);
+            }
+            callback(null, 'Message queued as abcdef'); // accept the message once the stream is ended
+        });
+    }
+});
+
+server.on('error', err => {
+    console.log('Error occurred');
+    console.log(err);
+});
+
+// start listening
+server.listen(SERVER_PORT, SERVER_HOST);