diff --git a/src/Symfony/Component/Mailer/Exception/UnsupportedSchemeException.php b/src/Symfony/Component/Mailer/Exception/UnsupportedSchemeException.php
index b0612b23808fe..23a8ec7e70944 100644
--- a/src/Symfony/Component/Mailer/Exception/UnsupportedSchemeException.php
+++ b/src/Symfony/Component/Mailer/Exception/UnsupportedSchemeException.php
@@ -40,6 +40,10 @@ class UnsupportedSchemeException extends LogicException
             'class' => Bridge\Mailjet\Transport\MailjetTransportFactory::class,
             'package' => 'symfony/mailjet-mailer',
         ],
+        'mailpace' => [
+            'class' => Bridge\MailPace\Transport\MailPaceTransportFactory::class,
+            'package' => 'symfony/mail-pace-mailer',
+        ],
         'mandrill' => [
             'class' => Bridge\Mailchimp\Transport\MandrillTransportFactory::class,
             'package' => 'symfony/mailchimp-mailer',
diff --git a/src/Symfony/Component/Mailer/Tests/Exception/UnsupportedSchemeExceptionTest.php b/src/Symfony/Component/Mailer/Tests/Exception/UnsupportedSchemeExceptionTest.php
index 5dcf0f1bbfd7c..f95e294d5c097 100644
--- a/src/Symfony/Component/Mailer/Tests/Exception/UnsupportedSchemeExceptionTest.php
+++ b/src/Symfony/Component/Mailer/Tests/Exception/UnsupportedSchemeExceptionTest.php
@@ -20,6 +20,7 @@
 use Symfony\Component\Mailer\Bridge\MailerSend\Transport\MailerSendTransportFactory;
 use Symfony\Component\Mailer\Bridge\Mailgun\Transport\MailgunTransportFactory;
 use Symfony\Component\Mailer\Bridge\Mailjet\Transport\MailjetTransportFactory;
+use Symfony\Component\Mailer\Bridge\MailPace\Transport\MailPaceTransportFactory;
 use Symfony\Component\Mailer\Bridge\OhMySmtp\Transport\OhMySmtpTransportFactory;
 use Symfony\Component\Mailer\Bridge\Postmark\Transport\PostmarkTransportFactory;
 use Symfony\Component\Mailer\Bridge\Sendgrid\Transport\SendgridTransportFactory;
@@ -41,6 +42,7 @@ public static function setUpBeforeClass(): void
             MailerSendTransportFactory::class => false,
             MailgunTransportFactory::class => false,
             MailjetTransportFactory::class => false,
+            MailPaceTransportFactory::class => false,
             MandrillTransportFactory::class => false,
             OhMySmtpTransportFactory::class => false,
             PostmarkTransportFactory::class => false,
@@ -70,6 +72,7 @@ public static function messageWhereSchemeIsPartOfSchemeToPackageMapProvider(): \
         yield ['mailersend', 'symfony/mailersend-mailer'];
         yield ['mailgun', 'symfony/mailgun-mailer'];
         yield ['mailjet', 'symfony/mailjet-mailer'];
+        yield ['mailpace', 'symfony/mail-pace-mailer'];
         yield ['mandrill', 'symfony/mailchimp-mailer'];
         yield ['ohmysmtp', 'symfony/oh-my-smtp-mailer'];
         yield ['postmark', 'symfony/postmark-mailer'];