diff --git a/README.md b/README.md
index ba20d26..670d16b 100644
--- a/README.md
+++ b/README.md
@@ -36,14 +36,14 @@ return [
     'dot_mail' => [
         'default' => [
             //...
-            'transport' => Symfony\Component\Mailer\Transport\Smtp\SmtpTransport::class,
+            'transport' => 'sendmail',
             //...
         ]
     ]
 ]
 ```
 
-### Mail - SMTP
+### Mail - ESMTP
 
 If you want your application to send mails on e.g. registration, contact, then edit the file `config/autoload/mail.local.php`.  Set the `transport`, `message_options` and `smtp_options` keys like below.
 
@@ -55,7 +55,8 @@ Under `smtp_options` key:
 
 - `host` - the mail server's hostname or IP address
 - `port` - the mail server's port
-- `connection_config` - fill in the `username`, `password` and `ssl` keys with the login details of the email used in `from` above
+- `connection_config` - fill in the `username` and `password` keys with the login details of the email used in `from` above
+- if you want to disable auto_tls set `tls` key to false
 
 Note: all other keys can be left as is.
 
@@ -65,7 +66,7 @@ return [
     'dot_mail' => [
         'default' => [
             //...
-            'transport' => Symfony\Component\Mailer\Transport\Smtp\SmtpTransport::class,
+            'transport' => 'esmtp'
             'message_options' => [
                 'from' => '',
                 //...
@@ -76,7 +77,7 @@ return [
                 'connection_config' => [
                     'username' => '',
                     'password' => '',
-                    'ssl' => '',
+                    'tls' => null,
                 ]
             ]
             //...
diff --git a/config/mail.global.php b/config/mail.global.php
new file mode 100644
index 0000000..10308ca
--- /dev/null
+++ b/config/mail.global.php
@@ -0,0 +1,81 @@
+<?php
+
+declare(strict_types=1);
+
+return [
+
+    /**
+     * Dotkernel mail module configuration
+     * Note that many of these options can be set programmatically too, when sending mail messages actually that is
+     * what you'll usually do, these config provide just default and options that remain the same for all mails
+     */
+    'dot_mail' => [
+        //the key is the mail service name, this is the default one, which does not extends any configuration
+        'default' => [
+            //message configuration
+            'message_options' => [
+                //from email address of the email
+                'from' => '',
+                //from name to be displayed instead of from address
+                'from_name' => '',
+                //reply-to email address of the email
+                'reply_to' => '',
+                //replyTo name to be displayed instead of the address
+                'reply_to_name' => '',
+                //destination email address as string or a list of email addresses
+                'to' => [],
+                //copy destination addresses
+                'cc' => [],
+                //hidden copy destination addresses
+                'bcc' => [],
+                //email subject
+                'subject' => '',
+                //body options - content can be plain text, HTML
+                'body' => [
+                    'content' => '',
+                    'charset' => 'utf-8',
+                ],
+                //attachments config
+                'attachments' => [
+                    'files' => [],
+                    'dir'   => [
+                        'iterate'   => false,
+                        'path'      => 'data/mail/attachments',
+                        'recursive' => false,
+                    ],
+                ],
+            ],
+            /**
+             * the mail transport to use
+             * can be any class implementing Symfony\Component\Mailer\Transport\TransportInterface
+             *
+             * for standard mail transports, you can use these aliases
+             * - sendmail => Symfony\Component\Mailer\Transport\SendmailTransport
+             * - esmtp     => Symfony\Component\Mailer\Transport\Smtp\EsmtpTransport
+             *
+             * defaults to sendmail
+             **/
+            'transport' => 'sendmail',
+            //options that will be used only if esmtp  adapter is used
+            'smtp_options' => [
+                //hostname or IP address of the mail server
+                'host' => '',
+                //port of the mail server - 587 or 465 for secure connections
+                'port'              => 587,
+                'connection_config' => [
+                    //the smtp authentication identity
+                    'username' => '',
+                    //the smtp authentication credential
+                    'password' => '',
+                    //to disable auto_tls set tls key to false
+                    //it's not recommended to disable TLS while connecting to an SMTP server over the Internet
+                    'tls' => null,
+                ],
+            ],
+        ],
+        // option to log the SENT emails
+        'log' => [
+            'sent' => getcwd() . '/log/mail/sent.log',
+        ],
+    ],
+];
diff --git a/config/mail.global.php.dist b/config/mail.global.php.dist
index 5ed3c08..10308ca 100644
--- a/config/mail.global.php.dist
+++ b/config/mail.global.php.dist
@@ -2,8 +2,6 @@
 
 declare(strict_types=1);
 
-use Symfony\Component\Mailer\Transport\SendmailTransport;
-
 return [
 
     /**
@@ -14,17 +12,6 @@ return [
     'dot_mail' => [
         //the key is the mail service name, this is the default one, which does not extends any configuration
         'default' => [
-            /**
-             * the mail transport to use
-             * can be any class implementing Symfony\Component\Mailer\Transport\TransportInterface
-             *
-             * for standard mail transports, you can use these aliases
-             * - sendmail => Symfony\Component\Mailer\Transport\SendmailTransport
-             * - smtp     => Symfony\Component\Mailer\Transport\Smtp\SmtpTransport
-             *
-             * defaults to sendmail
-             **/
-            'transport' => SendmailTransport::class,
             //message configuration
             'message_options' => [
                 //from email address of the email
@@ -58,7 +45,18 @@ return [
                     ],
                 ],
             ],
-            //options that will be used only if Symfony\Component\Mailer\Transport\Smtp\SmtpTransport adapter is used
+            /**
+             * the mail transport to use
+             * can be any class implementing Symfony\Component\Mailer\Transport\TransportInterface
+             *
+             * for standard mail transports, you can use these aliases
+             * - sendmail => Symfony\Component\Mailer\Transport\SendmailTransport
+             * - esmtp     => Symfony\Component\Mailer\Transport\Smtp\EsmtpTransport
+             *
+             * defaults to sendmail
+             **/
+            'transport' => 'sendmail',
+            //options that will be used only if esmtp  adapter is used
             'smtp_options' => [
                 //hostname or IP address of the mail server
                 'host' => '',
@@ -69,6 +67,9 @@ return [
                     'username' => '',
                     //the smtp authentication credential
                     'password' => '',
+                    //to disable auto_tls set tls key to false
+                    //it's not recommended to disable TLS while connecting to an SMTP server over the Internet
+                    'tls' => null,
                 ],
             ],
         ],
diff --git a/docs/book/v5/configuration.md b/docs/book/v5/configuration.md
index 7316366..35faeeb 100644
--- a/docs/book/v5/configuration.md
+++ b/docs/book/v5/configuration.md
@@ -21,9 +21,9 @@ $this->mailService->getMessage()->addTo("receiver@email.com");
 ## Transport configuration
 
 `dot-mail` uses the `transport` key under the main `dot_mail` configuration key to select the email transport.
-It has four email transport classes available by default (`SmtpTransport`), one of which is to be added under the `dot_mail.transport` key for use.
+It has two email transport classes available (by default `sendmail`), one of which is to be added under the `dot_mail.transport` key for use.
 
-Sending email with the `Smtp` transport requires valid data for the values under `dot-mail.default.smtp_options`, which is only used in this case.
+Sending email with the `Esmtp` transport requires valid data for the values under `dot-mail.default.smtp_options`, which is only used in this case.
 
 > The configured path must be a writable directory
 
diff --git a/docs/book/v5/transports.md b/docs/book/v5/transports.md
index e6301eb..3a0d586 100644
--- a/docs/book/v5/transports.md
+++ b/docs/book/v5/transports.md
@@ -2,8 +2,8 @@
 
 `dot-mail` can use any transport class that implements `Symfony\Component\Mailer\Transport\TransportInterface`, with the standard transport available being:
 
-- `Symfony\Component\Mailer\Transport\Smtp\SmtpTransport,`
-- `Symfony\Component\Mailer\Transport\SendmailTransport,`
+- `esmtp,`
+- `sendmail,`
 
 > Feel free to use any custom transport you desire, provided it implements the mentioned `TransportInterface`.
 
@@ -11,4 +11,4 @@ PHP's `mail()` function is a wrapper over `Sendmail`, and as such has a differen
 
 - Note: emails sent using the sendmail transport will be more often delivered to SPAM.
 
-`Smtp` connects to the configured SMTP host in order to handle sending emails.
+`Esmtp` connects to the configured SMTP host in order to handle sending emails.
diff --git a/src/Factory/MailServiceAbstractFactory.php b/src/Factory/MailServiceAbstractFactory.php
index b3507fd..b03a8d5 100644
--- a/src/Factory/MailServiceAbstractFactory.php
+++ b/src/Factory/MailServiceAbstractFactory.php
@@ -21,7 +21,7 @@
 use RecursiveDirectoryIterator;
 use RecursiveIteratorIterator;
 use Symfony\Component\Mailer\Transport;
-use Symfony\Component\Mailer\Transport\Smtp\SmtpTransport;
+use Symfony\Component\Mailer\Transport\Smtp\EsmtpTransport;
 use Symfony\Component\Mailer\Transport\TransportInterface;
 
 use function explode;
@@ -177,13 +177,14 @@ protected function createTransport(ContainerInterface $container): TransportInte
 
     protected function setupTransportConfig(TransportInterface $transport): TransportInterface
     {
-        if ($transport instanceof SmtpTransport) {
-            $user = $this->mailOptions->getSmtpOptions()->getConnectionConfig()['username'];
-            $pass = $this->mailOptions->getSmtpOptions()->getConnectionConfig()['password'];
-            $port = $this->mailOptions->getSmtpOptions()->getPort();
-            $host = $this->mailOptions->getSmtpOptions()->getHost();
-
-            $transport = Transport::fromDsn('smtp://' . $user . ':' . $pass . '@' . $host . ':' . $port);
+        if ($transport instanceof EsmtpTransport) {
+            $user      = $this->mailOptions->getSmtpOptions()->getConnectionConfig()['username'];
+            $pass      = $this->mailOptions->getSmtpOptions()->getConnectionConfig()['password'];
+            $tls       = $this->mailOptions->getSmtpOptions()->getConnectionConfig()['tls'] === false ? 'false' : null;
+            $port      = $this->mailOptions->getSmtpOptions()->getPort();
+            $host      = $this->mailOptions->getSmtpOptions()->getHost();
+            $transport = Transport::fromDsn('smtp://' . $user . ':' . $pass . '@' . $host . ':' . $port
+                . '?auto_tls=' . $tls);
         }
 
         return $transport;
diff --git a/src/Options/MailOptions.php b/src/Options/MailOptions.php
index cac4935..10153ce 100644
--- a/src/Options/MailOptions.php
+++ b/src/Options/MailOptions.php
@@ -6,7 +6,7 @@
 
 use Laminas\Stdlib\AbstractOptions;
 use Symfony\Component\Mailer\Transport\SendmailTransport;
-use Symfony\Component\Mailer\Transport\Smtp\SmtpTransport;
+use Symfony\Component\Mailer\Transport\Smtp\EsmtpTransport;
 use Symfony\Component\Mailer\Transport\TransportInterface;
 
 use function array_key_exists;
@@ -21,9 +21,9 @@
 class MailOptions extends AbstractOptions
 {
     protected array $eventListeners                = [];
-    protected TransportInterface|string $transport = SmtpTransport::class;
+    protected TransportInterface|string $transport = EsmtpTransport::class;
     protected array $transportMap                  = [
-        'smtp'     => [SmtpTransport::class],
+        'esmtp'    => [EsmtpTransport::class],
         'sendmail' => [SendmailTransport::class],
     ];
     protected MessageOptions $messageOptions;
diff --git a/test/CommonTrait.php b/test/CommonTrait.php
index 09fda28..f74833e 100644
--- a/test/CommonTrait.php
+++ b/test/CommonTrait.php
@@ -6,7 +6,6 @@
 
 use org\bovigo\vfs\vfsStream;
 use org\bovigo\vfs\vfsStreamDirectory;
-use Symfony\Component\Mailer\Transport\Smtp\SmtpTransport;
 
 trait CommonTrait
 {
@@ -46,17 +45,6 @@ private function generateConfig(): array
         return [
             'dot_mail' => [
                 'default' => [
-                    /**
-                     * the mail transport to use
-                     * can be any class implementing Symfony\Component\Mailer\Transport\TransportInterface
-                     *
-                     * for standard mail transports, you can use these aliases
-                     * - sendmail => Symfony\Component\Mailer\Transport\SendmailTransport
-                     * - smtp     => Symfony\Component\Mailer\Transport\Smtp\SmtpTransport
-                     *
-                     * defaults to sendmail
-                     **/
-                    'transport'       => SmtpTransport::class,
                     'message_options' => [
                         'from'          => '',
                         'from_name'     => '',
@@ -79,7 +67,18 @@ private function generateConfig(): array
                             ],
                         ],
                     ],
-                    //options that will be used only if Symfony\Component\Mailer\Transport\Smtp\SmtpTransport
+                    /**
+                     * the mail transport to use
+                     * can be any class implementing Symfony\Component\Mailer\Transport\TransportInterface
+                     *
+                     * for standard mail transports, you can use these aliases
+                     * - sendmail => Symfony\Component\Mailer\Transport\SendmailTransport
+                     * - esmtp     => Symfony\Component\Mailer\Transport\Smtp\EsmtpTransport
+                     *
+                     * defaults to sendmail
+                     **/
+                    'transport' => 'esmtp',
+                    //options that will be used only if Symfony\Component\Mailer\Transport\Smtp\EsmtpTransport
                     // adapter is used
                     'smtp_options' => [
                         'host'              => 'testHost',
@@ -89,11 +88,11 @@ private function generateConfig(): array
                             'username' => 'test',
                             //the smtp authentication credential
                             'password' => 'testPassword',
+                            'tsl'      => null,
                         ],
                     ],
                 ],
                 'test'    => 'string test',
-
                 // option to log the SENT emails
                 'log' => [
                     'sent' => $this->fileSystem->url() . '/log/mail/sent.log',
diff --git a/test/Factory/MailServiceAbstractFactoryTest.php b/test/Factory/MailServiceAbstractFactoryTest.php
index 13565e8..a926bba 100644
--- a/test/Factory/MailServiceAbstractFactoryTest.php
+++ b/test/Factory/MailServiceAbstractFactoryTest.php
@@ -23,7 +23,7 @@
 use Psr\Container\ContainerExceptionInterface;
 use Psr\Container\ContainerInterface;
 use Psr\Container\NotFoundExceptionInterface;
-use Symfony\Component\Mailer\Transport\Smtp\SmtpTransport;
+use Symfony\Component\Mailer\Transport\Smtp\EsmtpTransport;
 
 class MailServiceAbstractFactoryTest extends TestCase
 {
@@ -91,7 +91,7 @@ public function testGenerateServiceWithProvidedAdapter(): void
             ->willReturn($this->messageOptions);
         $this->mailOptions->expects($this->any())
             ->method('getTransport')
-            ->willReturn($this->createMock(SmtpTransport::class));
+            ->willReturn($this->createMock(EsmtpTransport::class));
         $this->mailOptions->expects($this->any())
             ->method('getEventListeners')
             ->willReturn([AbstractMailEventListener::class]);
@@ -116,7 +116,7 @@ public function testGenerateServiceWithProvidedAdapter(): void
             ->willReturn([
                 'username' => 'test',
                 'password' => 'testPassword',
-                'port'     => 587,
+                'tls'      => null,
             ]);
 
         $this->smtpOptions->expects($this->once())
@@ -129,7 +129,7 @@ public function testGenerateServiceWithProvidedAdapter(): void
 
         $mailService = (new Subject())($this->container, $requestedName);
         $this->assertInstanceOf(MailService::class, $mailService);
-        $this->assertInstanceOf(SmtpTransport::class, $mailService->getTransport());
+        $this->assertInstanceOf(EsmtpTransport::class, $mailService->getTransport());
     }
 
     /**
@@ -159,7 +159,7 @@ public function testGenerateServiceWithoutProvidedAdapter(): void
             ->willReturn($this->messageOptions);
         $this->mailOptions->expects($this->any())
             ->method('getTransport')
-            ->willReturn(SmtpTransport::class);
+            ->willReturn(EsmtpTransport::class);
         $this->mailOptions->expects($this->any())
             ->method('getEventListeners')
             ->willReturn(['Invalid Listener Test']);
@@ -169,13 +169,13 @@ public function testGenerateServiceWithoutProvidedAdapter(): void
             ->willReturnMap([
                 ['dot-mail.options.default', $this->mailOptions],
                 [LogServiceInterface::class, $this->createMock(LogService::class)],
-                [SmtpTransport::class, new SmtpTransport()],
+                [EsmtpTransport::class, new EsmtpTransport()],
                 ['Invalid Listener Test', 'Invalid Listener provided'],
             ]);
         $this->container->expects($this->any())
             ->method('has')
             ->willReturnMap([
-                [SmtpTransport::class, true],
+                [EsmtpTransport::class, true],
                 ['Invalid Listener Test', true],
             ]);
 
@@ -184,7 +184,7 @@ public function testGenerateServiceWithoutProvidedAdapter(): void
             ->willReturn([
                 'username' => 'test',
                 'password' => 'testPassword',
-                'port'     => 587,
+                'tls'      => false,
             ]);
 
         $this->smtpOptions->expects($this->once())
@@ -200,7 +200,7 @@ public function testGenerateServiceWithoutProvidedAdapter(): void
         $mailService = (new Subject())($this->container, $requestedName);
 
         $this->assertInstanceOf(MailService::class, $mailService);
-        $this->assertInstanceOf(SmtpTransport::class, $mailService->getTransport());
+        $this->assertInstanceOf(EsmtpTransport::class, $mailService->getTransport());
         $this->assertCount(2, $mailService->getAttachments());
     }
 
@@ -247,7 +247,7 @@ public function testGenerateServiceThrowException(): void
             ->willReturnMap([
                 ['dot-mail.options.default', $this->mailOptions],
                 [LogServiceInterface::class, $this->createMock(LogService::class)],
-                [SmtpTransport::class, new SmtpTransport()],
+                [EsmtpTransport::class, new EsmtpTransport()],
                 ['Invalid Listener Test', 'Invalid Listener provided'],
             ]);
         $this->container->expects($this->any())
diff --git a/test/Options/MailOptionsTest.php b/test/Options/MailOptionsTest.php
index bb5d983..5e78703 100644
--- a/test/Options/MailOptionsTest.php
+++ b/test/Options/MailOptionsTest.php
@@ -9,7 +9,7 @@
 use Dot\Mail\Options\MessageOptions;
 use Dot\Mail\Options\SmtpOptions;
 use PHPUnit\Framework\TestCase;
-use Symfony\Component\Mailer\Transport\Smtp\SmtpTransport;
+use Symfony\Component\Mailer\Transport\Smtp\EsmtpTransport;
 
 class MailOptionsTest extends TestCase
 {
@@ -17,7 +17,7 @@ public function testGettersAndSetters(): void
     {
         $subject = new MailOptions();
 
-        $transport      = 'smtp';
+        $transport      = 'esmtp';
         $transportMap   = ['test' => 'array'];
         $messageOptions = ['from' => '', 'to' => []];
         $smtpOptions    = ['host' => '', 'port' => 587];
@@ -29,7 +29,7 @@ public function testGettersAndSetters(): void
         $subject->setSmtpOptions($smtpOptions);
         $subject->setEventListeners($eventListeners);
 
-        $this->assertSame(SmtpTransport::class, $subject->getTransport());
+        $this->assertSame(EsmtpTransport::class, $subject->getTransport());
         $this->assertSame($transportMap, $subject->getTransportMap());
         $this->assertInstanceOf(MessageOptions::class, $subject->getMessageOptions());
         $this->assertInstanceOf(SmtpOptions::class, $subject->getSmtpOptions());
diff --git a/test/Service/MailServiceTest.php b/test/Service/MailServiceTest.php
index 02bae60..b87c78a 100644
--- a/test/Service/MailServiceTest.php
+++ b/test/Service/MailServiceTest.php
@@ -17,7 +17,7 @@
 use PHPUnit\Framework\MockObject\Exception;
 use PHPUnit\Framework\MockObject\MockObject;
 use PHPUnit\Framework\TestCase;
-use Symfony\Component\Mailer\Transport\Smtp\SmtpTransport;
+use Symfony\Component\Mailer\Transport\Smtp\EsmtpTransport;
 use Symfony\Component\Mailer\Transport\TransportInterface;
 use Symfony\Component\Mime\Part\TextPart;
 
@@ -68,7 +68,7 @@ public function setUp(): void
     public function testGettersAndSetters(): void
     {
         $attachments = ['/testAttachment.pdf', '/testDirectory/testAttachment2.xls'];
-        $transport   = $this->createMock(SmtpTransport::class);
+        $transport   = $this->createMock(EsmtpTransport::class);
 
         $this->mailService->setAttachments($attachments);
         $this->mailService->setTransport($transport);