In the rush of daily business, where communication is of critical importance and decisions are often reached within a matter of minutes, every delay in the transmission of your emails may have appreciable repercussions – no matter whether it’s regarding coordination with customers, financial communication, internal authorization processes or sharing vital information with suppliers.
Why speed is crucial
Some sectors are particularly reliant on the immediate delivery of messages. One real-life example from our customer base illustrates this very clearly. While still in the ambulance, emergency doctors and paramedics already transmit medical reports to the destination hospital by way of encrypted email. This gives medical staff the opportunity to prepare as well as possible for the arrival of the incoming patient. In this case, every second counts.
Beyond such extreme situations, however, delays in email delivery may also prove to be critically important. For instance, when a team is waiting for an order to be confirmed, production stoppages need to be avoided, or time-critical alerts are sent to IT systems – in all these cases it is essential for emails to arrive quickly, reliably and securely.
Our performance in figures
That’s why when it comes to Retarus Email Security, throughput times are among the performance indicators we keep a highly critical eye on and seek to optimize continually. And our analyses for mid-2025 show that our values are more than presentable:
- Emails not undergoing sandbox analysis reach their recipients in a median time of less than 2.4 seconds, meaning that a large proportion of the emails are substantially faster. Even taking 90% of the emails into consideration, the delivery time is still below 7 seconds. Delivery only takes longer than 31 seconds in absolutely exceptional cases (1%), for example when extraordinarily complex checks are required or particularly suspect messages need to be analyzed.
- If sandbox analysis is carried out, delivery naturally takes a little longer. However, even then the median is still quicker than 2.6 seconds. Looking at 90% of all messages, the emails still reached their recipients in an impressive median time of less than 9 seconds.
In any case, our smart Sandbox Prefilter ensures that only messages where a deeper check can realistically be expected to add value are forwarded to the sandbox. In this way, we combine maximum security with minimum latency and precisely hit the sweet spot our customers expect.
Technology which makes a difference
These rapid delivery times are achieved by virtue of Retarus’ multiply redundant, state-of-the-art enterprise cloud infrastructure and our smart security infrastructure, which carries out multiple checks in parallel. What’s more, we are continuously developing new features. Currently, our product team is working on the concept of a fast-lane option for trustworthy communication, which will enable certain functions to purposefully be bypassed. This could conceivably be useful in machine-to-machine communication, which only takes place between mutually known partners and is thus naturally less exposed to risk.
Transparency always of paramount importance
Speed never comes at the cost of transparency with Retarus E-Mail Security. On the contrary, despite multiple simultaneous checks, algorithms and sources, administrators are easily able to follow all steps in the process and their outcomes by way of tracking points – at all times and at their own convenience. Should a user contact support regarding a purportedly missing email, Retarus Email Live Search enables admins to find out within seconds whether and why the message has been blocked. But one thing is clear: It won’t have been due to unnecessarily long processing times at Retarus.
