Microsoft rolls out protection against ‘reply all’ email storms

Microsoft rolls out protection against 'reply all' email storms

One surefire way to take down an email system is to send a message with thousands of recipients attached only to have a few of them hit reply all, generating millions more emails. Now Microsoft is introducing protection against what are commonly referred to as “reply all email storms.”

As The Verge reports, the new feature is for Office 365 users and called Reply All Storm Protection. It works by adding a new type of monitoring to Microsoft’s Exchange Online hosted email system, which looks specifically for potential email storms. To begin with, one condition will be monitored: if 10 reply-all responses to over 5,000 recipients are detected within a 60-minute period, subsequent replies to that email thread will be blocked for four hours. Read more…

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