diff --git a/lib/params/base_validator.rb b/lib/params/base_validator.rb
index 8a5abcf1..988cbfcb 100644
--- a/lib/params/base_validator.rb
+++ b/lib/params/base_validator.rb
@@ -73,7 +73,7 @@ module Params
       return if params[key].to_s.include?('<')
 
       if params[key].to_s.strip.split(/\s*[;,]\s*/).compact_blank
-                    .all? { |email| EmailTypo::DotCom.call(email).match?(EMAIL_REGEXP) }
+                    .all? { |email| EmailTypo::DotCom.call(email).match?(EMAIL_REGEXP) || email.include?('--') }
         return
       end