diff --git a/lib/email_log_interceptor.rb b/lib/email_log_interceptor.rb
index c42eecdbd24..12c23602a8a 100644
--- a/lib/email_log_interceptor.rb
+++ b/lib/email_log_interceptor.rb
@@ -13,8 +13,8 @@ def self.delivering_email(mail)
       body: mail.body.encoded,
       notify_reference:,
       application_form_id: mail.header['application_form_id']&.value,
-      mailer: mail.header['rails_mailer'].value,
-      mail_template: mail.header['rails_mail_template'].value,
+      mailer: mail.header['rails-mailer']&.first&.value,
+      mail_template: mail.header['rails-mail-template']&.first&.value,
       delivery_status: mail.perform_deliveries ? 'pending' : 'skipped',
     )
 
diff --git a/spec/services/send_new_application_email_to_provider_spec.rb b/spec/services/send_new_application_email_to_provider_spec.rb
index 9612cee8de5..c1d427d86b5 100644
--- a/spec/services/send_new_application_email_to_provider_spec.rb
+++ b/spec/services/send_new_application_email_to_provider_spec.rb
@@ -18,8 +18,8 @@
     training_provider_email = ActionMailer::Base.deliveries.find { |e| e.header['to'].value == training_provider_user.email_address }
     ratifying_provider_email = ActionMailer::Base.deliveries.find { |e| e.header['to'].value == ratifying_provider_user.email_address }
 
-    expect(training_provider_email['rails-mail-template'].value).to eq('application_submitted')
-    expect(ratifying_provider_email['rails-mail-template'].value).to eq('application_submitted')
+    expect(training_provider_email['rails-mail-template'].first.value).to eq('application_submitted')
+    expect(ratifying_provider_email['rails-mail-template'].first.value).to eq('application_submitted')
   end
 
   it 'sends a different email when the candidate supplied safeguarding information' do
@@ -32,7 +32,7 @@
 
     described_class.new(application_choice: choice).call
 
-    email = ActionMailer::Base.deliveries.find { |e| e.header['rails_mail_template'].value == 'application_submitted_with_safeguarding_issues' }
+    email = ActionMailer::Base.deliveries.find { |e| e.header['rails-mail-template'].first.value == 'application_submitted_with_safeguarding_issues' }
 
     expect(email).to be_present
   end