diff --git a/.env.example b/.env.example
index 62b08a7b1..7f40616b5 100644
--- a/.env.example
+++ b/.env.example
@@ -60,9 +60,10 @@ MAILER_SENDER_EMAIL=Chatwoot <accounts@chatwoot.com>
 
 #SMTP domain key is set up for HELO checking
 SMTP_DOMAIN=chatwoot.com
-# the default value is set "mailhog" and is used by docker-compose for development environments,
+# Set the value to "mailhog" if using docker-compose for development environments,
 # Set the value as "localhost" or your SMTP address in other environments
-SMTP_ADDRESS=mailhog
+# If SMTP_ADDRESS is empty, Chatwoot would try to use sendmail(postfix)
+SMTP_ADDRESS=
 SMTP_PORT=1025
 SMTP_USERNAME=
 SMTP_PASSWORD=
diff --git a/config/initializers/mailer.rb b/config/initializers/mailer.rb
index bc28e9198..d7359bc0e 100644
--- a/config/initializers/mailer.rb
+++ b/config/initializers/mailer.rb
@@ -30,6 +30,9 @@ Rails.application.configure do
   # You can use letter opener for your local development by setting the environment variable
   config.action_mailer.delivery_method = :letter_opener if Rails.env.development? && ENV['LETTER_OPENER']
 
+  # Use sendmail if using postfix for email
+  config.action_mailer.delivery_method = :sendmail if ENV['SMTP_ADDRESS'].blank?
+
   #########################################
   # Configuration Related to Action MailBox
   #########################################