List for Email field blank

[MLawson59]

Hi

I would like to create a list showing email fields that have no value how do I call these fields in the list ? would it be " " or null?

Thanks

[karstenkoehler]

Hi @MLawson59,

When you create a contact-based list and select a contact property, you should see a filter option “is unknown”. When you select this, the list will return all contacts where this field is empty.

Best regards!

[MLawson59]

Thank you

[KMillecam]

I must be doing something wrong. (Maybe the use of And/Or?

I’m attachign a screen capture of my filter dialog.