Search Results for: DMARC

One of the things I am working on at the moment is improving the speed at which Talos protects Cisco customers from new threats. Every second counts for zero-day or hailstorm attacks. If it takes 1...

Eine gute Reputation, relevante Inhalte und konsequente Listenhygiene sind die Basis Gute Vorsätze gehören zum Jahreswechsel wie Feuerwerk und „Dinner for One“, meist bleiben sie aber das, was sie si...

A good reputation, relevant content, and consistent list hygiene are the basis Resolutions belong to the New Year like fireworks and cava, but most of the time they remain what they are – just reso...

A good reputation, relevant content, and consistent list hygiene are the basis Resolutions belong to the New Year like fireworks and cava, but most of the time they remain what they are – just resolu...

Authentication is absolutely essential for professional email transmission. If you want to go further than SPF and DKIM and use DMARC, then alignment is obligatory. But even without DMARC, alignment i...

1. Background DKIM is a widely used method for the authentication of emails. But when DKIM is not used correctly, it is not effective and can offer a false sense of security. For this reason, here we...

In the first place, what is phishing? Phishing is an invented word cobbled out of the two words “password” and “fishing”. Criminals use fake emails to try to obtain personal data – in particular logi...

Commissioning a mail server is initially not terribly complicated, but at the latest when it comes to keeping an eye on your reputation, or if you want to implement authentication measures like SPF (S...

Commissioning a mail server is initially not terribly complicated, but at the latest when it comes to keeping an eye on your reputation, or if you want to implement authentication measures like SPF (S...

Why was IPv6 developed? IPv4 allows for around 4 billion addresses, of which 3.7 billion are usable. This address space is becoming increasingly exhausted. At the end of July 2015 only 160,000 IPv4 a...