Do not leave the subject line of emails empty

Emails that arrive in my inbox without a subject line will be marked as SPAM and then they are deleted. I do not read them.
If you want to ask me a question, (post a comment on this site or) send me an email with something in the subject field.

Proper use of the subject field is good netiquette anyway: it makes it easier for the recipient (me) to sort and prioritize emails.