It can happen that an entry gets submitted that is either too broad, or was submitted in error, and if this is the case then we would like to know aobut it. However, challenges do not mean that the entry will be immediately removed and is dependant on the case by case basis, of why the user submitted it. But a challenged entry will be marked as such so that users may choose not to include challenged entries in their generated files.
However, do not expect much sympathy, if you have not updated your systems to use 'Best Practises' in naming conventions and outbound rate limiters to control the Spam.
But, if you are trying to help by providing a better regular expression for your networks, you may see a quicker response to your challenges.
NOTE: We currently do not have the system in place for automated challenges. If you want to challenge an entry, please send an email to our administrator.