Is there a way to filter spam email that does not contain a subject? It seems that you cannot create a rule to filter out mail where the subject is blank directly so is there a work around?
Subject: Foward to server mail rule team
Subject: no condition for that in mail rules
“Is empty” or “is missing” or “length of” are not available text operators. It has been suggested as an enhancement.
MBOO65KQVW: Customer wants to reject email when the subject field is empty.