diff --git a/config/initializers/smtp.rb b/config/initializers/smtp.rb
index 53f2d00..3f2e28f 100644
--- a/config/initializers/smtp.rb
+++ b/config/initializers/smtp.rb
@@ -13,6 +13,5 @@ ActionMailer::Base.smtp_settings = {
   authentication: config.authentication_type&.to_sym,
   enable_starttls: config.enable_starttls?,
   enable_starttls_auto: config.enable_starttls_auto?,
-  openssl_verify_mode: config.openssl_verify_mode,
-  ssl: config.ssl?
+  openssl_verify_mode: config.openssl_verify_mode
 }
diff --git a/doc/config/environment-variables.md b/doc/config/environment-variables.md
index 57873c0..5763504 100644
--- a/doc/config/environment-variables.md
+++ b/doc/config/environment-variables.md
@@ -74,7 +74,6 @@ This document contains all the environment variables which are available for thi
 | `SMTP_ENABLE_STARTTLS` | Boolean | Use STARTTLS when connecting to the SMTP server and fail if unsupported | false |
 | `SMTP_ENABLE_STARTTLS_AUTO` | Boolean | Detects if STARTTLS is enabled in the SMTP server and starts to use it | true |
 | `SMTP_OPENSSL_VERIFY_MODE` | String | When using TLS, you can set how OpenSSL checks the certificate. Use 'none' for no certificate checking | peer |
-| `SMTP_SSL` | Boolean | Use an SSL/TLS connection to the SMTP server (SMTPS) | false |
 | `SMTP_FROM_NAME` | String | The name to use as the from name outgoing emails from Postal | Postal |
 | `SMTP_FROM_ADDRESS` | String | The e-mail to use as the from address outgoing emails from Postal | postal@example.com |
 | `RAILS_ENVIRONMENT` | String | The Rails environment to run the application in | production |
diff --git a/doc/config/yaml.yml b/doc/config/yaml.yml
index 82eb582..5efb28f 100644
--- a/doc/config/yaml.yml
+++ b/doc/config/yaml.yml
@@ -161,8 +161,6 @@ smtp:
   enable_starttls_auto: true
   # When using TLS, you can set how OpenSSL checks the certificate. Use 'none' for no certificate checking
   openssl_verify_mode: peer
-  # Use an SSL/TLS connection to the SMTP server (SMTPS)
-  ssl: false
   # The name to use as the from name outgoing emails from Postal
   from_name: Postal
   # The e-mail to use as the from address outgoing emails from Postal
diff --git a/lib/postal/config_schema.rb b/lib/postal/config_schema.rb
index 42a547c..e5424fd 100644
--- a/lib/postal/config_schema.rb
+++ b/lib/postal/config_schema.rb
@@ -380,11 +380,6 @@ module Postal
         default "peer"
       end
 
-      boolean :ssl do
-        description "Use an SSL/TLS connection to the SMTP server (SMTPS)"
-        default false
-      end
-
       string :from_name do
         description "The name to use as the from name outgoing emails from Postal"
         default "Postal"