IMAP, POP3 and SMTP clients for Dart and Flutter email developers.

Available under the commercial friendly MPL Mozilla Public License 2.0.

Installation

Add this dependency your pubspec.yaml file:

dependencies:
  enough_mail: ^2.1.1

The latest version or enough_mail is enough_mail version.

API Documentation

Check out the full API documentation at https://pub.dev/documentation/enough_mail/latest/

High Level API Usage

The high level API abstracts away from IMAP and POP3 details, reconnects automatically and allows to easily watch a mailbox for new messages. A simple usage example for using the high level API:

import 'dart:io';
import 'package:enough_mail/enough_mail.dart';

String userName = 'user.name';
String password = 'password';

void main() async {
  await mailExample();
}


/// Builds a simple example message
MimeMessage buildMessage() {
  final builder = MessageBuilder.prepareMultipartAlternativeMessage(
    plainText: 'Hello world!',
    htmlText: '<p>Hello world!</p>',
  )
    ..from = [MailAddress('Personal Name', 'sender@domain.com')]
    ..to = [
      MailAddress('Recipient Personal Name', 'recipient@domain.com'),
      MailAddress('Other Recipient', 'other@domain.com')
    ];
  return builder.buildMimeMessage();
}

/// Builds an example message with attachment
Future<MimeMessage> buildMessageWithAttachment() async {
  final builder = MessageBuilder()
    ..from = [MailAddress('Personal Name', 'sender@domain.com')]
    ..to = [
      MailAddress('Recipient Personal Name', 'recipient@domain.com'),
      MailAddress('Other Recipient', 'other@domain.com')
    ]
    ..addMultipartAlternative(
      plainText: 'Hello world!',
      htmlText: '<p>Hello world!</p>',
    );
  final file = File.fromUri(Uri.parse('file://./document.pdf'));
  await builder.addFile(file, MediaSubtype.applicationPdf.mediaType);
  return builder.buildMimeMessage();
}

/// High level mail API example
Future<void> mailExample() async {
  final email = '$userName@$domain';
  print('discovering settings for  $email...');
  final config = await Discover.discover(email);
  if (config == null) {
    // note that you can also directly create an account when
    // you cannot auto-discover the settings:
    // Compare the [MailAccount.fromManualSettings]
    // and [MailAccount.fromManualSettingsWithAuth]
    // methods for details.
    print('Unable to auto-discover settings for $email');
    return;
  }
  print('connecting to ${config.displayName}.');
  final account =
      MailAccount.fromDiscoveredSettings('my account', email, password, config);
  final mailClient = MailClient(account, isLogEnabled: true);
  try {
    await mailClient.connect();
    print('connected');
    final mailboxes =
        await mailClient.listMailboxesAsTree(createIntermediate: false);
    print(mailboxes);
    await mailClient.selectInbox();
    final messages = await mailClient.fetchMessages(count: 20);
    messages.forEach(printMessage);
    mailClient.eventBus.on<MailLoadEvent>().listen((event) {
      print('New message at ${DateTime.now()}:');
      printMessage(event.message);
    });
    await mailClient.startPolling();
    // generate and send email:
    final mimeMessage = buildMessage();
    await mailClient.sendMessage(mimeMessage);
  } on MailException catch (e) {
    print('High level API failed with $e');
  }
}

Low Level Usage

A simple usage example for using the low level API:

import 'dart:io';
import 'package:enough_mail/enough_mail.dart';

String userName = 'user.name';
String password = 'password';
String imapServerHost = 'imap.domain.com';
int imapServerPort = 993;
bool isImapServerSecure = true;
String popServerHost = 'pop.domain.com';
int popServerPort = 995;
bool isPopServerSecure = true;
String smtpServerHost = 'smtp.domain.com';
int smtpServerPort = 465;
bool isSmtpServerSecure = true;

void main() async {
  await discoverExample();
  await imapExample();
  await smtpExample();
  await popExample();
  exit(0);
}

Future<void> discoverExample() async {
  var email = 'someone@enough.de';
  var config = await Discover.discover(email, isLogEnabled: false);
  if (config == null) {
    print('Unable to discover settings for $email');
  } else {
    print('Settings for $email:');
    for (var provider in config.emailProviders) {
      print('provider: ${provider.displayName}');
      print('provider-domains: ${provider.domains}');
      print('documentation-url: ${provider.documentationUrl}');
      print('Incoming:');
      print(provider.preferredIncomingServer);
      print('Outgoing:');
      print(provider.preferredOutgoingServer);
    }
  }
}

/// Low level IMAP API usage example
Future<void> imapExample() async {
  final client = ImapClient(isLogEnabled: false);
  try {
    await client.connectToServer(imapServerHost, imapServerPort,
        isSecure: isImapServerSecure);
    await client.login(userName, password);
    final mailboxes = await client.listMailboxes();
    print('mailboxes: $mailboxes');
    await client.selectInbox();
    // fetch 10 most recent messages:
    final fetchResult = await client.fetchRecentMessages(
        messageCount: 10, criteria: 'BODY.PEEK[]');
    for (final message in fetchResult.messages) {
      printMessage(message);
    }
    await client.logout();
  } on ImapException catch (e) {
    print('IMAP failed with $e');
  }
}

/// Low level SMTP API example
Future<void> smtpExample() async {
  final client = SmtpClient('enough.de', isLogEnabled: true);
  try {
    await client.connectToServer(smtpServerHost, smtpServerPort,
        isSecure: isSmtpServerSecure);
    await client.ehlo();
    if (client.serverInfo.supportsAuth(AuthMechanism.plain)) {
      await client.authenticate('user.name', 'password', AuthMechanism.plain);
    } else if (client.serverInfo.supportsAuth(AuthMechanism.login)) {
      await client.authenticate('user.name', 'password', AuthMechanism.login);
    } else {
      return;
    }
    final builder = MessageBuilder.prepareMultipartAlternativeMessage(
      plainText: 'hello world.',
      htmlText: '<p>hello <b>world</b></p>',
    )
      ..from = [MailAddress('My name', 'sender@domain.com')]
      ..to = [MailAddress('Your name', 'recipient@domain.com')]
      ..subject = 'My first message';
    final mimeMessage = builder.buildMimeMessage();
    final sendResponse = await client.sendMessage(mimeMessage);
    print('message sent: ${sendResponse.isOkStatus}');
  } on SmtpException catch (e) {
    print('SMTP failed with $e');
  }
}

/// Low level POP3 API example
Future<void> popExample() async {
  final client = PopClient(isLogEnabled: false);
  try {
    await client.connectToServer(popServerHost, popServerPort,
        isSecure: isPopServerSecure);
    await client.login(userName, password);
    // alternative login:
    // await client.loginWithApop(userName, password); // optional different login mechanism
    final status = await client.status();
    print(
        'status: messages count=${status.numberOfMessages}, messages size=${status.totalSizeInBytes}');
    final messageList = await client.list(status.numberOfMessages);
    print(
        'last message: id=${messageList?.first?.id} size=${messageList?.first?.sizeInBytes}');
    var message = await client.retrieve(status.numberOfMessages);
    printMessage(message);
    message = await client.retrieve(status.numberOfMessages + 1);
    print('trying to retrieve newer message succeeded');
    await client.quit();
  } on PopException catch (e) {
    print('POP failed with $e');
  }
}

void printMessage(MimeMessage message) {
  print('from: ${message.from} with subject "${message.decodeSubject()}"');
  if (!message.isTextPlainMessage()) {
    print(' content-type: ${message.mediaType}');
  } else {
    final plainText = message.decodeTextPlainPart();
    if (plainText != null) {
      final lines = plainText.split('\r\n');
      for (final line in lines) {
        if (line.startsWith('>')) {
          // break when quoted text starts
          break;
        }
        print(line);
      }
    }
  }
}

Related Projects

Check out these related projects:

Miss a feature or found a bug?

Please file feature requests and bugs at the issue tracker.

Contribute

Want to contribute? Please check out contribute. This is an open-source community project. Anyone, even beginners, can contribute.

This is how you contribute:

  • Fork the enough_mail project by pressing the fork button.
  • Clone your fork to your computer: git clone github.com/$your_username/enough_mail
  • Do your changes. When you are done, commit changes with git add -A and git commit.
  • Push changes to your personal repository: git push origin
  • Go to enough_mail and create a pull request.

Thank you in advance!

Features

Base standards

IMAP extensions

The following IMAP extensions are supported:

SMTP Extensions

The following SMTP extensions are supported:

Security

The following security extensions are supported:

  • ✅ Partial signing of messages using DKIM

Supported encodings

Character encodings:

  • ASCII (7bit)
  • UTF-8 (uft8, 8bit)
  • ISO-8859-1 (latin-1)
  • ISO-8859-2 - 16 (latin-2 - 16)
  • Windows-1250, 1251, 1252, 1253, 1254 and 1256
  • GB-2312, GBK, GB-18030, Chinese, CSGB-2312, CSGB-231280, CSISO-58-GB-231280, ISO-IR-58, X-Mac-ChineseSimp
  • Big5
  • KOI8-r and KOI8-u

Transfer encodings:

To do

Develop and Contribute

  • To start check out the package and then run dart run test to run all tests.
  • Public facing library classes are in lib, lib/imap and lib/smtp.
  • Private classes are in lib/src.
  • Test cases are in test.
  • Please file a pull request for each improvement/fix that you are create - your contributions are welcome.
  • Check out https://github.com/enough-Software/enough_mail/contribute for good first issues.

License

enough_mail is licensed under the commecial friendly Mozilla Public License 2.0.

Libraries

codecs
Email codec classes
discover
Discovers email settings based on an email address.
enough_mail
With enough_mail you can connect to any mail service via IMAP, POP3 and SMTP
highlevel
Highlevel email API
imap
Anything you need to fetch and process messages using the IMAP protocol.
mime
Base email classes
pop
Fetch messages using the POP3 protocol
smtp
Everything you need to send messages using the SMTP protocol.