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Does anybody know how to configure this filter in Gmail?

I've tried various things like just having quotes, (no subject), subject:(no subject), etc.

I realized that doesn't work because when you look at the headers of an email with "no subject" in the subject line, the actual subject header line is completely missing.

I even exported a filter, edited the xml, then re-imported it taking out any characters from within the value='' line. doesn't work either.

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marked as duplicate by Al E., Alex, Jacob Jan Tuinstra, Eight Days of Malaise, OnenOnlyWalter Jul 5 '13 at 6:16

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1 Answer 1

You can consider writing a Google Script that will extract all emails with blank attachments. The script will be something like this:

 var thread = GmailApp.getInboxThreads(0,1)[0]; 
 var message = thread.getMessages()[0]; 
 if (message.getSubject() == "") {
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