i want to send a link to a mail address to reset the password. but it is showing "Swift_TransportException in AbstractSmtpTransport.php line 383: Expected response code 250 but got code "530", with message "530 5.7.1 Authentication required"
my .env is like this
MAIL_DRIVER=smtp
MAIL_HOST=asmtp.unoeuro.com
MAIL_PORT=587
[email protected]
MAIL_PASSWORD=********
MAIL_ENCRYPTION=tls
my reset.blade.php is like this
 <form class="form-horizontal" role="form" method="POST" action="{{ password/reset/, [$token] }}">
                    {{ csrf_field() }}
                   <!--  <input type="hidden" name="token" value="{{ $token }}"> -->
                    <div class="form-group{{ $errors->has('email') ? ' has-error' : '' }}">
                        <label for="email" class="col-md-4 control-label">E-Mail Address</label>
                        <div class="col-md-6">
                            <input id="email" type="email" class="form-control" name="email" value="{{ $email or old('email') }}" required autofocus>
                            @if ($errors->has('email'))
                                <span class="help-block">
                                    <strong>{{ $errors->first('email') }}</strong>
                                </span>
                            @endif
                        </div>
                    </div>
                    <div class="form-group{{ $errors->has('password') ? ' has-error' : '' }}">
                        <label for="password" class="col-md-4 control-label">Password</label>
                        <div class="col-md-6">
                            <input id="password" type="password" class="form-control" name="password" required>
                            @if ($errors->has('password'))
                                <span class="help-block">
                                    <strong>{{ $errors->first('password') }}</strong>
                                </span>
                            @endif
                        </div>
                    </div>
                    <div class="form-group{{ $errors->has('password_confirmation') ? ' has-error' : '' }}">
                        <label for="password-confirm" class="col-md-4 control-label">Confirm Password</label>
                        <div class="col-md-6">
                            <input id="password-confirm" type="password" class="form-control" name="password_confirmation" required>
                            @if ($errors->has('password_confirmation'))
                                <span class="help-block">
                                    <strong>{{ $errors->first('password_confirmation') }}</strong>
                                </span>
                            @endif
                        </div>
                    </div>
                    <div class="form-group">
                        <div class="col-md-6 col-md-offset-4">
                            <button type="submit" class="btn btn-primary">
                                Reset Password
                            </button>
                        </div>
                    </div>
                </form>
my mail.php is like this
   <?php
   return [
   'driver' => env('MAIL_DRIVER', 'smtp'),
   'host' => env('MAIL_HOST', 'asmtp.unoeuro.com'),
  'port' => env('MAIL_PORT', 587),
  'from' => [
    'address' => '[email protected]',
    'name' => 'Example',
  ],
  'encryption' => env('MAIL_ENCRYPTION', 'tls'),
  'username' => env('MAIL_USERNAME'),
  'password' => env('MAIL_PASSWORD'),
  'sendmail' => '/usr/sbin/sendmail -bs',
 ];
what changes i need to make to send a mail and reset the password?
                        
I think you need to make correct
MAIL_USERNAMEandMAIL_PASSWORD.You can follow given link(Trying to get Laravel 5 email to work) for more detail.
Hope this work for you!
UPDATE
Please once you can clear the cache: