Technology Office 365 is protected against "Reply all" mass emails

Office 365 is protected against “Reply all” mass emails


Sometimes they cause amusement and creative e-mail conversations, but mostly they are annoying and simply spam, especially in large companies: “Reply all” mass mails. Office 365 can now block something like this, also to reduce the server load.

The emails have often been said to be dead, but in most companies and authorities they are and remain an important, indeed irreplaceable communication tool. However, the classic way of sending messages over the Internet also has pitfalls that, although they could be easily avoided, still occur again and again.
The right non-delivery report (NDR)

Above all, this includes the so-called “Reply-All Storm”, which occurs when an e-mail addressed to everyone is sent by an employee and then subsequently answered by all other people. A case recently became known to Microsoft in which around 52,000 employees of the group were caught and pulled along by the snowball effect of such emails.

Microsoft announced a Reply-All protection system at its Ignite conference last year, but its introduction may have been accelerated by the recent internal “Reply All” episode. Because now one has started to distribute a system that can detect and block such unwanted mass emails, as Microsoft writes.

With ten mails per hour it is over

Of course, the solution is more complicated, because of course you can’t and can’t block mass emails per se. Because longer conversations that affect all employees are often planned or desired. The Office 365 mechanism is activated when ten “Reply-All Storms” with more than 5000 recipients have occurred in one hour.

Subsequently, mass emails are blocked for four hours, the authors then receive a so-called NDR (Non-Delivery Report). The whole thing is a server-side measure that only works internally in Office 365, and can also be fine-tuned by admins or activated (de).


Email, spam, messages, email, mailing

Email, spam, messages, email, mailing
Muhammad Ribkhan / CC0

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