Customized email in Flutter to users using mailer package

 Follow the steps ;

  • get mailer from 'pub.dev'. 
                     Go to pub.dev: https://pub.dev/packages/mailer/install
  • get the dependencies by copying from mailer installing process and pasting it in pubspec.yaml
  • and then import the mailer package in main file or required files
                    
  • copy the function from mailer and paste it in main file.
                    


For live demo, checkout this youtube video:


FULL CODE:
    
    main.dart:
import 'package:flutter/material.dart';
import 'package:toast/toast.dart';
import 'package:mailer/mailer.dart';
import 'package:mailer/smtp_server.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Youtube Test App'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {

  sendMail() async {
    String username = 'youremailid@gmail.com';
    String password = 'enteryourpassword';

    final smtpServer = gmail(username, password);
    final message = Message()
      ..from = Address(username)
      ..recipients.add('recipient@gmail.com')
//      ..ccRecipients.addAll(['destCc1@example.com', 'destCc2@example.com'])
//      ..bccRecipients.add(Address('bccAddress@example.com'))
      ..subject = 'Mail using mailer package :: 😀 :: ${DateTime.now()}'
      ..text = 'This is the plain text.\nThis is line 2 of the text part.'
      ..html = "<h1>Write the content here</h1>\n<p>Hey! its easy use html tags for alignments</p>";

    try {
      final sendReport = await send(message, smtpServer);
      print('Message sent: ' + sendReport.toString());
      Toast.show("You have clicked the Button! and email sent", context, duration: 3, gravity:  Toast.CENTER);
    } on MailerException catch (e) {
      print('Message not sent.');
      for (var p in e.problems) {
        print('Problem: ${p.code}: ${p.msg}');
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: MaterialButton(
          onPressed: sendMail,
          splashColor: Colors.blueGrey,
          color: Colors.blue,
          child: Text('click',style: TextStyle(color: Colors.black,
              fontSize: 20.0),
          ),
          shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(15.0)),
        ),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }

} 


Pubspec.yaml:

 name: youtubetest

description: Youtube test application

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# In Android, build-name is used as versionName while build-number used as versionCode.
# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
# In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
version: 1.0.0+1

environment:
  sdk: ">=2.1.0 <3.0.0"

dependencies:
  mailer: ^3.2.1
  toast: ^0.1.5
  flutter:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^0.1.2

dev_dependencies:
  flutter_test:
    sdk: flutter


# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec

# The following section is specific to Flutter.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true

  # To add assets to your application, add an assets section, like this:
  # assets:
  #  - images/a_dot_burr.jpeg
  #  - images/a_dot_ham.jpeg

  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.dev/assets-and-images/#resolution-aware.

  # For details regarding adding assets from package dependencies, see
  # https://flutter.dev/assets-and-images/#from-packages

  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  # fonts:
  #   - family: Schyler
  #     fonts:
  #       - asset: fonts/Schyler-Regular.ttf
  #       - asset: fonts/Schyler-Italic.ttf
  #         style: italic
  #   - family: Trajan Pro
  #     fonts:
  #       - asset: fonts/TrajanPro.ttf
  #       - asset: fonts/TrajanPro_Bold.ttf
  #         weight: 700
  #
  # For details regarding fonts from package dependencies,
  # see https://flutter.dev/custom-fonts/#from-packages

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