diff --git a/.scaffold/tests/bats/docker-compose.bats b/.scaffold/tests/bats/docker-compose.bats
index 4d8bf61fd..7673a0009 100644
--- a/.scaffold/tests/bats/docker-compose.bats
+++ b/.scaffold/tests/bats/docker-compose.bats
@@ -53,7 +53,6 @@ load _helper.bash
   echo "DREVOPS_WEBROOT=docroot" >>.env
   echo "DREVOPS_DB_IMAGE=myorg/my_db_image" >>.env
   echo "XDEBUG_ENABLE=1" >>.env
-  echo "SSMTP_MAILHUB=false" >>.env
   echo "DRUPAL_SHIELD_USER=jane" >>.env
   echo "DRUPAL_SHIELD_PASS=passw" >>.env
   echo "DRUPAL_REDIS_ENABLED=1" >>.env
diff --git a/.scaffold/tests/bats/fixtures/docker-compose.env.json b/.scaffold/tests/bats/fixtures/docker-compose.env.json
index 28ac43b00..deb56af4e 100644
--- a/.scaffold/tests/bats/fixtures/docker-compose.env.json
+++ b/.scaffold/tests/bats/fixtures/docker-compose.env.json
@@ -37,7 +37,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
@@ -87,7 +86,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
@@ -134,7 +132,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
@@ -189,7 +186,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
@@ -245,7 +241,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
@@ -307,7 +302,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
@@ -379,7 +373,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
diff --git a/.scaffold/tests/bats/fixtures/docker-compose.env_local.json b/.scaffold/tests/bats/fixtures/docker-compose.env_local.json
index 28ac43b00..deb56af4e 100644
--- a/.scaffold/tests/bats/fixtures/docker-compose.env_local.json
+++ b/.scaffold/tests/bats/fixtures/docker-compose.env_local.json
@@ -37,7 +37,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
@@ -87,7 +86,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
@@ -134,7 +132,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
@@ -189,7 +186,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
@@ -245,7 +241,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
@@ -307,7 +302,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
@@ -379,7 +373,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
diff --git a/.scaffold/tests/bats/fixtures/docker-compose.env_mod.json b/.scaffold/tests/bats/fixtures/docker-compose.env_mod.json
index 4ded1d559..7a346e32a 100644
--- a/.scaffold/tests/bats/fixtures/docker-compose.env_mod.json
+++ b/.scaffold/tests/bats/fixtures/docker-compose.env_mod.json
@@ -37,7 +37,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "false",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": "1"
             },
@@ -87,7 +86,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "false",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": "1"
             },
@@ -134,7 +132,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "false",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": "1"
             },
@@ -189,7 +186,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "false",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": "1"
             },
@@ -245,7 +241,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "false",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": "1"
             },
@@ -307,7 +302,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "false",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": "1"
             },
@@ -379,7 +373,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "false",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": "1"
             },
diff --git a/.scaffold/tests/bats/fixtures/docker-compose.noenv.json b/.scaffold/tests/bats/fixtures/docker-compose.noenv.json
index b335c69b1..e73841ca2 100644
--- a/.scaffold/tests/bats/fixtures/docker-compose.noenv.json
+++ b/.scaffold/tests/bats/fixtures/docker-compose.noenv.json
@@ -37,7 +37,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
@@ -87,7 +86,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
@@ -134,7 +132,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
@@ -189,7 +186,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
@@ -245,7 +241,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
@@ -307,7 +302,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
@@ -379,7 +373,6 @@
                 "MARIADB_PASSWORD": "drupal",
                 "MARIADB_PORT": "3306",
                 "MARIADB_USERNAME": "drupal",
-                "SSMTP_MAILHUB": "host.docker.internal:1025",
                 "TZ": "Australia/Melbourne",
                 "XDEBUG_ENABLE": ""
             },
diff --git a/docker-compose.yml b/docker-compose.yml
index 3e1f0ca0a..500283602 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -60,8 +60,6 @@ x-environment: &default-environment
   XDEBUG_ENABLE: ${XDEBUG_ENABLE:-}
   # Pass-through 'CI' variable used to identify the CI environment.
   CI: ${CI:-}
-  # Forward emails to Mailhog locally.
-  SSMTP_MAILHUB: ${SSMTP_MAILHUB:-host.docker.internal:1025}
   # Path to configuration files.
   DRUPAL_CONFIG_PATH: ${DRUPAL_CONFIG_PATH:-/app/config/default}
   # Drupal file paths.