diff --git a/symfony/amazon-mailer/4.3/manifest.json b/symfony/amazon-mailer/4.3/manifest.json
new file mode 100644
index 00000000..7d434cda
--- /dev/null
+++ b/symfony/amazon-mailer/4.3/manifest.json
@@ -0,0 +1,6 @@
+{
+    "env": {
+        "#1": "MAILER_DSN=smtp://$AWS_ACCESS_KEY:$AWS_SECRET_KEY@ses",
+        "#2": "MAILER_DSN=http://$AWS_ACCESS_KEY:$AWS_SECRET_KEY@ses"
+    }
+}
diff --git a/symfony/mailchimp-mailer/4.3/manifest.json b/symfony/mailchimp-mailer/4.3/manifest.json
new file mode 100644
index 00000000..91c16cb0
--- /dev/null
+++ b/symfony/mailchimp-mailer/4.3/manifest.json
@@ -0,0 +1,6 @@
+{
+    "env": {
+        "#1": "MAILER_DSN=smtp://$MANDRILL_USERNAME:$MANDRILL_PASSWORD@mandrill",
+        "#2": "MAILER_DSN=http://$MANDRILL_KEY@mandrill"
+    }
+}
diff --git a/symfony/mailgun-mailer/4.3/manifest.json b/symfony/mailgun-mailer/4.3/manifest.json
new file mode 100644
index 00000000..56d4d493
--- /dev/null
+++ b/symfony/mailgun-mailer/4.3/manifest.json
@@ -0,0 +1,6 @@
+{
+    "env": {
+        "#1": "MAILER_DSN=smtp://$MAILGUN_USERNAME:$MAILGUN_PASSWORD@mailgun",
+        "#2": "MAILER_DSN=http://$MAILGUN_KEY:$MAILGUN_DOMAIN@mailgun"
+    }
+}
diff --git a/symfony/postmark-mailer/4.3/manifest.json b/symfony/postmark-mailer/4.3/manifest.json
new file mode 100644
index 00000000..a1248422
--- /dev/null
+++ b/symfony/postmark-mailer/4.3/manifest.json
@@ -0,0 +1,5 @@
+{
+    "env": {
+        "#1": "MAILER_DSN=smtp://$POSTMARK_ID@postmark"
+    }
+}
diff --git a/symfony/sendgrid-mailer/4.3/manifest.json b/symfony/sendgrid-mailer/4.3/manifest.json
new file mode 100644
index 00000000..c9a9b968
--- /dev/null
+++ b/symfony/sendgrid-mailer/4.3/manifest.json
@@ -0,0 +1,5 @@
+{
+    "env": {
+        "#1": "MAILER_DSN=smtp://$SENDGRID_KEY@sendgrid"
+    }
+}