diff --git a/lib/submissions.rb b/lib/submissions.rb
index 710bbf92..b020152c 100644
--- a/lib/submissions.rb
+++ b/lib/submissions.rb
@@ -108,6 +108,7 @@ module Submissions
     return email.downcase if email.to_s.include?('.gob')
     return email.downcase if email.to_s.include?('.om')
     return email.downcase if email.to_s.include?('.mm')
+    return email.downcase if email.to_s.include?('.cm')
     return email.downcase unless email.to_s.include?('.')
 
     fixed_email = EmailTypo.call(email.delete_prefix('<'))