So called 'newsletter bombs' are increasingly being sent to the publicly known email addresses of journalists, companies, and also dot-gov email addresses. These attacks send thousands of fake newsletter sign-up emails to targeted email addresses rendering the attacked mailbox useless. According to German secure email service Tutanota, which had its own main contact address targeted, these attacks are easy to execute because most newsletter sign-up forms have no protection against malicious bot sign-ups. "Being a secure email service, the irony of not being able to use our main mailbox was particularly depressing", says Matthias Pfau, co-founder and developer of Tutanota.…
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