diff --git a/config/mail.ts b/config/mail.ts
index 440345c..a585722 100644
--- a/config/mail.ts
+++ b/config/mail.ts
@@ -18,7 +18,7 @@ const mailConfig: MailConfig = {
   | a mailer
   |
   */
-  mailer: 'mailgun',
+  mailer: Env.get('MAILER'),
 
   /*
   |--------------------------------------------------------------------------
diff --git a/env.ts b/env.ts
index 4dd1fe7..3c7e9bf 100644
--- a/env.ts
+++ b/env.ts
@@ -30,6 +30,7 @@ export default Env.rules({
   REDIS_HOST: Env.schema.string({ format: 'host' }),
   REDIS_PORT: Env.schema.number(),
   REDIS_PASSWORD: Env.schema.string.optional(),
+  MAILER: Env.schema.enum(['mailgun', 'smtp'] as const),
   SMTP_HOST: Env.schema.string({ format: 'host' }),
   SMTP_PORT: Env.schema.number(),
   SMTP_USERNAME: Env.schema.string(),