diff --git a/app/mailers/application_mailer.rb b/app/mailers/application_mailer.rb
index 00696caa0..bec34766e 100644
--- a/app/mailers/application_mailer.rb
+++ b/app/mailers/application_mailer.rb
@@ -1,5 +1,5 @@
 class ApplicationMailer < ActionMailer::Base
-  default from: "DEV Community <#{SiteConfig.default_site_email}>"
+  default from: "DEV Community <#{ApplicationConfig['DEFAULT_SITE_EMAIL']}>"
   layout "mailer"
   default template_path: ->(mailer) { "mailers/#{mailer.class.name.underscore}" }
 
diff --git a/app/mailers/digest_mailer.rb b/app/mailers/digest_mailer.rb
index 6eb1f93a2..cfe4cab15 100644
--- a/app/mailers/digest_mailer.rb
+++ b/app/mailers/digest_mailer.rb
@@ -1,5 +1,5 @@
 class DigestMailer < ApplicationMailer
-  default from: "DEV Digest <#{SiteConfig.default_site_email}>"
+  default from: "DEV Digest <#{ApplicationConfig['DEFAULT_SITE_EMAIL']}>"
 
   def digest_email(user, articles)
     @user = user
diff --git a/app/mailers/pro_membership_mailer.rb b/app/mailers/pro_membership_mailer.rb
index 9a15798cd..b50f24ac9 100644
--- a/app/mailers/pro_membership_mailer.rb
+++ b/app/mailers/pro_membership_mailer.rb
@@ -1,5 +1,5 @@
 class ProMembershipMailer < ApplicationMailer
-  default from: "DEV Pro Memberships <#{SiteConfig.default_site_email}>"
+  default from: "DEV Pro Memberships <#{ApplicationConfig['DEFAULT_SITE_EMAIL']}>"
 
   def expiring_membership(pro_membership, expiration_date)
     @pro_membership = pro_membership
diff --git a/app/models/site_config.rb b/app/models/site_config.rb
index fbe6e5694..b8dd4b08b 100644
--- a/app/models/site_config.rb
+++ b/app/models/site_config.rb
@@ -10,7 +10,7 @@ class SiteConfig < RailsSettings::Base
 
   # staff account
   field :staff_user_id, type: :integer, default: 1
-  field :default_site_email, type: :string, default: "yo@dev.to", readonly: true
+  field :default_site_email, type: :string, default: "yo@dev.to"
   field :social_networks_handle, type: :string, default: "thepracticaldev"
 
   # images