diff --git a/lib/email/processor.rb b/lib/email/processor.rb
index 9c807fc2b8e..30c50c2baef 100644
--- a/lib/email/processor.rb
+++ b/lib/email/processor.rb
@@ -24,7 +24,7 @@ module Email
           raise
         end
       rescue => e
-        return handle_bounce(e) if @receiver.is_bounce?
+        return handle_bounce(e) if @receiver&.is_bounce?
 
         log_email_process_failure(@mail, e)
         incoming_email = @receiver.try(:incoming_email)
@@ -156,7 +156,7 @@ module Email
     end
 
     def can_send_rejection_email?(email, type)
-      return false if @receiver.sent_to_mailinglist_mirror?
+      return false if @receiver&.sent_to_mailinglist_mirror?
       return true if type == :email_reject_unrecognized_error
 
       key = "rejection_email:#{email}:#{type}:#{Date.today}"
diff --git a/spec/lib/email/processor_spec.rb b/spec/lib/email/processor_spec.rb
index 4f57124145f..2d0d797b495 100644
--- a/spec/lib/email/processor_spec.rb
+++ b/spec/lib/email/processor_spec.rb
@@ -48,6 +48,13 @@ RSpec.describe Email::Processor do
     end
   end
 
+  describe "when mail is not set" do
+    it "does not raise an error" do
+      expect { Email::Processor.process!(nil) }.not_to raise_error
+      expect { Email::Processor.process!("") }.not_to raise_error
+    end
+  end
+
   describe "rate limits" do
     let(:mail) { "From: #{from}\nTo: bar@foo.com\nSubject: FOO BAR\n\nFoo foo bar bar?" }
     let(:limit_exceeded) { RateLimiter::LimitExceeded.new(10) }