diff --git a/lib/params/base_validator.rb b/lib/params/base_validator.rb
index 988cbfcb..cd0005f6 100644
--- a/lib/params/base_validator.rb
+++ b/lib/params/base_validator.rb
@@ -72,7 +72,7 @@ module Params
       return if params[key].blank?
       return if params[key].to_s.include?('<')
 
-      if params[key].to_s.strip.split(/\s*[;,]\s*/).compact_blank
+      if params[key].to_s.strip.split(%r{\s*[;,/]\s*}).compact_blank
                     .all? { |email| EmailTypo::DotCom.call(email).match?(EMAIL_REGEXP) || email.include?('--') }
         return
       end
diff --git a/lib/submissions.rb b/lib/submissions.rb
index cf6ef851..3f52cbf5 100644
--- a/lib/submissions.rb
+++ b/lib/submissions.rb
@@ -118,15 +118,17 @@ module Submissions
     return if email.blank?
     return if email.is_a?(Numeric)
 
-    return email.downcase if email.to_s.include?(',') ||
-                             email.to_s.match?(/\.(?:gob|om|mm|cm|et|mo|nz|za|ie)\z/) ||
-                             email.to_s.exclude?('.')
+    email = email.to_s.tr('/', ',')
+
+    return email.downcase if email.include?(',') ||
+                             email.match?(/\.(?:gob|om|mm|cm|et|mo|nz|za|ie)\z/) ||
+                             email.exclude?('.')
 
     fixed_email = EmailTypo.call(email.delete_prefix('<'))
 
     return fixed_email if fixed_email == email
 
-    domain = email.to_s.split('@').last.to_s.downcase
+    domain = email.split('@').last.to_s.downcase
     fixed_domain = fixed_email.to_s.split('@').last
 
     return email.downcase if domain == fixed_domain