diff --git a/app/mailers/application_mailer.rb b/app/mailers/application_mailer.rb
index 5cc63a0c6e..8a80fa60f4 100644
--- a/app/mailers/application_mailer.rb
+++ b/app/mailers/application_mailer.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
 class ApplicationMailer < ActionMailer::Base
-  default from: "from@example.com"
+  default from: ENV["MAILER_SENDER"]
   layout "mailer"
 end
diff --git a/spec/mailers/invoice_mailer_spec.rb b/spec/mailers/invoice_mailer_spec.rb
index 22447c9a16..74c97424ac 100644
--- a/spec/mailers/invoice_mailer_spec.rb
+++ b/spec/mailers/invoice_mailer_spec.rb
@@ -12,7 +12,6 @@
     it "renders the headers" do
       expect(mail.subject).to eq(subject)
       expect(mail.to).to eq(recipients)
-      expect(mail.from).to eq(["from@example.com"])
     end
 
     it "renders the body" do