diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 1a40cb0..f9ff3bf 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -7,11 +7,7 @@
 
 name: Tests
 
-on:
-  push:
-    branches: [ "main" ]
-  pull_request:
-    branches: [ "main" ]
+on: [push, pull_request]
 
 permissions:
   contents: read
@@ -23,13 +19,14 @@ jobs:
     strategy:
       matrix:
         ruby-version: ['3.1', '3.2', '3.3']
+        rails-version: ['gemfiles/rails_7.0.gemfile', 'gemfiles/rails_7.1.gemfile']
+
+    env:
+      BUNDLE_GEMFILE: ${{ matrix.rails-version }}
 
     steps:
     - uses: actions/checkout@v3
     - name: Set up Ruby
-    # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,
-    # change this to (see https://github.com/ruby/setup-ruby#versioning):
-    # uses: ruby/setup-ruby@v1
       uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby-version }}
diff --git a/Appraisals b/Appraisals
new file mode 100644
index 0000000..6548bad
--- /dev/null
+++ b/Appraisals
@@ -0,0 +1,7 @@
+appraise "rails-7.0" do
+  gem "rails", "~> 7.0.0"
+end
+
+appraise "rails-7.1" do
+  gem "rails", "~> 7.1.0"
+end
diff --git a/Gemfile b/Gemfile
index f1fe10a..e231bf5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,3 +12,5 @@ gem "sqlite3"
 gem "debug", ">= 1.0.0"
 
 gem "rails-dom-testing"
+gem "appraisal"
+
diff --git a/README.md b/README.md
index 36b5bf1..ea12783 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@
 Add the gem:
 
 ```bash
-bundle add email_error_reporter && bundle install
+bundle add email_error_reporter
 ```
 
 and configure the email addresses that should receive an email in the case of an exception:
@@ -28,16 +28,37 @@ All exceptions are reported automatically. No additional code required.
 
 Please consult the [official guides](https://guides.rubyonrails.org/error_reporting.html) for an introduction to the error reporting API.
 
+## Optional configuration
+
+Set a custom from address.
+
+```ruby
+# default: "no-reply@example.com"
+config.email_error_reporter.from = "your-custom-email@example.com"
+```
+
+---
+
+Disables the email reports for specific environments.
+
+```ruby
+# e.g. in development.rb
+# default: true
+config.email_error_reporter.enabled = false
+```
+
 ## Test your setup
 
 You can use the built-in rake task `rake email_error_reporter:check` to check if everything works correctly in your setup.
 
 If you're using Kamal, you can run the following command to test the setup in production:
 
-```
+```sh
 kamal app exec -p 'bundle exec rake email_error_reporter:test_email'
 ```
 
+If everything is setup correctly, this rake task will send a demo email to your configured `to` address with a sample exception.
+
 ## License
 
 The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).
diff --git a/email_error_reporter.gemspec b/email_error_reporter.gemspec
index 72c9a47..a10548b 100644
--- a/email_error_reporter.gemspec
+++ b/email_error_reporter.gemspec
@@ -22,5 +22,6 @@ Gem::Specification.new do |spec|
     Dir["{app,config,db,lib}/**/*", "MIT-LICENSE", "Rakefile", "README.md"]
   end
 
-  spec.add_dependency "rails", ">= 7.1.2"
+  spec.required_ruby_version = '>= 3.1.0'
+  spec.add_dependency "rails", ">= 7.0.0"
 end
diff --git a/gemfiles/rails_7.0.gemfile b/gemfiles/rails_7.0.gemfile
new file mode 100644
index 0000000..ec6188e
--- /dev/null
+++ b/gemfiles/rails_7.0.gemfile
@@ -0,0 +1,12 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org/"
+
+gem "puma"
+gem "sqlite3"
+gem "debug", ">= 1.0.0"
+gem "rails-dom-testing"
+gem "appraisal", group: :development
+gem "rails", "~> 7.0.0"
+
+gemspec path: "../"
diff --git a/gemfiles/rails_7.1.gemfile b/gemfiles/rails_7.1.gemfile
new file mode 100644
index 0000000..1cce9dc
--- /dev/null
+++ b/gemfiles/rails_7.1.gemfile
@@ -0,0 +1,12 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org/"
+
+gem "puma"
+gem "sqlite3"
+gem "debug", ">= 1.0.0"
+gem "rails-dom-testing"
+gem "appraisal", group: :development
+gem "rails", "~> 7.1.0"
+
+gemspec path: "../"
diff --git a/lib/email_error_reporter/engine.rb b/lib/email_error_reporter/engine.rb
index b914d07..d6a2ea4 100644
--- a/lib/email_error_reporter/engine.rb
+++ b/lib/email_error_reporter/engine.rb
@@ -4,9 +4,13 @@ class Engine < ::Rails::Engine
 
     config.email_error_reporter = ActiveSupport::OrderedOptions.new
     config.email_error_reporter.to = []
+    config.email_error_reporter.from = "no-reply@example.com"
+    config.email_error_reporter.enabled = true
 
-    initializer "email_error_reporter.error_subscribe" do
-      Rails.error.subscribe(Subscriber.new)
+    initializer "email_error_reporter.error_subscribe" do |app|
+      if app.config.email_error_reporter.enabled
+        Rails.error.subscribe(Subscriber.new)
+      end
     end
 
     # ActiveJob cannot (de)-serialize exceptions by default
diff --git a/lib/email_error_reporter/error_mailer.rb b/lib/email_error_reporter/error_mailer.rb
index c560523..0df2c2a 100644
--- a/lib/email_error_reporter/error_mailer.rb
+++ b/lib/email_error_reporter/error_mailer.rb
@@ -17,6 +17,7 @@ def error(error, handled:, severity:, context:, source: nil)
 
       mail(
         subject: "#{severity_to_emoji.fetch(@severity)}  #{error.class}",
+        from: Rails.application.config.email_error_reporter.from,
         to: Rails.application.config.email_error_reporter.to
       )
     end
diff --git a/lib/email_error_reporter/version.rb b/lib/email_error_reporter/version.rb
index b0651e7..917bf46 100644
--- a/lib/email_error_reporter/version.rb
+++ b/lib/email_error_reporter/version.rb
@@ -1,3 +1,3 @@
 module EmailErrorReporter
-  VERSION = "0.1.0.pre"
+  VERSION = "0.3.0"
 end
diff --git a/test/dummy/config/application.rb b/test/dummy/config/application.rb
index 5295e62..8dfe5e0 100644
--- a/test/dummy/config/application.rb
+++ b/test/dummy/config/application.rb
@@ -13,7 +13,8 @@ class Application < Rails::Application
     # Please, add to the `ignore` list any other `lib` subdirectories that do
     # not contain `.rb` files, or that should not be reloaded or eager loaded.
     # Common ones are `templates`, `generators`, or `middleware`, for example.
-    config.autoload_lib(ignore: %w(assets tasks))
+
+    # config.autoload_lib(ignore: %w(assets tasks))
 
     # Configuration for the application, engines, and railties goes here.
     #
diff --git a/test/dummy/config/environments/development.rb b/test/dummy/config/environments/development.rb
index 84e2859..21a448d 100644
--- a/test/dummy/config/environments/development.rb
+++ b/test/dummy/config/environments/development.rb
@@ -72,7 +72,7 @@
   # config.action_cable.disable_request_forgery_protection = true
 
   # Raise error when a before_action's only/except options reference missing actions
-  config.action_controller.raise_on_missing_callback_actions = true
+  # config.action_controller.raise_on_missing_callback_actions = true
 
   config.email_error_reporter.to = ["test@example.com"]
 end
diff --git a/test/dummy/config/environments/test.rb b/test/dummy/config/environments/test.rb
index ee40759..afe54f6 100644
--- a/test/dummy/config/environments/test.rb
+++ b/test/dummy/config/environments/test.rb
@@ -60,7 +60,7 @@
   # config.action_view.annotate_rendered_view_with_filenames = true
 
   # Raise error when a before_action's only/except options reference missing actions
-  config.action_controller.raise_on_missing_callback_actions = true
+  # config.action_controller.raise_on_missing_callback_actions = true
 
   config.email_error_reporter.to = ["test@example.com"]
 end
diff --git a/test/subscriber_test.rb b/test/subscriber_test.rb
index c9c4fbd..ce3df2c 100644
--- a/test/subscriber_test.rb
+++ b/test/subscriber_test.rb
@@ -11,13 +11,53 @@ class SubscriberTest < ActiveSupport::TestCase
     end
 
   rescue TestError => e
-    assert_enqueued_email_with EmailErrorReporter::ErrorMailer, :error, args: ->(args) {
-      # TODO: find out, why args.first == e is false
-      [
-        args.first.message == e.message,
-        args.first.backtrace == e.backtrace,
-        args.first.class == e.class
-      ].all?
-    }
+    # matcher
+    assert_enqueued_with(
+      job: ActionMailer::MailDeliveryJob,
+      args: ->(j) {
+        [
+          "EmailErrorReporter::ErrorMailer" == j[0],
+          "error" == j[1],
+          "deliver_now" == j[2],
+          e.class == j[3][:args][0].class,
+          { handled: false, context: {}, severity: :error, source: rails_default_source } == j[3][:args][1],
+        ].all?
+      }
+    )
+  end
+
+  test "enqueues no mail if disabled" do
+    old_config = Rails.application.config.email_error_reporter.enabled
+    Rails.application.config.email_error_reporter.enabled = false
+    Rails.error.record(TestError) do
+      raise TestError
+    end
+
+  rescue TestError => e
+    # matcher
+    assert_enqueued_with(
+      job: ActionMailer::MailDeliveryJob,
+      args: ->(j) {
+        [
+          "EmailErrorReporter::ErrorMailer" == j[0],
+          "error" == j[1],
+          "deliver_now" == j[2],
+          e.class == j[3][:args][0].class,
+          { handled: false, context: {}, severity: :error, source: rails_default_source } == j[3][:args][1],
+        ].all?
+      }
+    )
+  ensure
+    Rails.application.config.email_error_reporter.enabled = old_config
+  end
+
+  private
+
+  def rails_default_source
+    if Gem::Version.new(Rails.version) >= Gem::Version.new("7.1.0")
+      "application"
+    else
+      nil
+    end
   end
 end