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List bombing: What does it mean and how to avoid it?

Recently, there’s some talk about list bombing. What does this actually mean?

While ISPs concentrate on attacks from a single IP (or IP range) or sending domain, listbombing uses various subscription forms for sending just a few mails from each.

Problem for the targeted address is, that a lot of mails are coming in in a small amount of time without consistent pattern – goal is to make the address unavailable for a specific time.

DOI doesn’t help here as well, because the DOI confirmation mail itself can be part of the attack and be used for it.

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MailChimp changes default Opt-In method – read here, why this is a bad idea

MailChimp, a bulk mail sender for small and medium-size senders is changing its default subscribe method from October 31st from Double-Opt-In to Single-Opt-In. In my opinion, this is not only a bad idea, but also against the evolution in times of GDPR and data security.

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German Posts

Wie Öffnungsraten im E-Mail Marketing gemessen werden

Für die meisten Marketer stellt die Öffnungsrate von E-Mails eine der wichtigsten Kenngrößen dar. Warum ist das so? Und wie wird die Öffnungsrate eigentlich gemessen? Sind hohe Abweichungen bei den verschiedenen ISPs (z.B. GMX, Yahoo, Hotmail) ein Grund zur Sorge?

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Why it is so hard, to find a safe password

Passwords should be safe – we all know that. But how can we achieve it? My opinion is: Today, there is no way to find a satisfying solution. I will explain why and try to find solutions from user perspective.

How people handle passwords

Which passwords do you use in the internet? Would you consider them to be safe? While talking with people, I get the impression there is mainly three categories, how people deal with that problem:

easy passwords - not a good idea

  1. People, who do not care at all. main goal is to remind the passwords. Often used are passwords like “qwerty”, “123456”, “password” or the name of the pet (or wife/husband). The password is the same on each login page on the internet.
  2. People, who make a science out of it. They use different passwords for each login and choose passwords with maximum security (mixture of letters, capitals, numbers, special characters). Those can only be stored in Password safes, because nobody can remember them anymore. (A password safe is an encrypted piece of software keeping lots of passwords with information of username, URL, etc. Usually you just need to remember one single password to unlock it.)
  3. People using mainly one password, which is hard to guess (like sentences with some replaced characters (e.g. “n0b0Dyc4Nr3aDTh!s”).
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German Posts

Spamtraps

Über Spamfallen (“Spamtraps”) und “Honeypots” sollte jeder E-Mail-Marketer Bescheid wissen, dennoch gibt nach nach wie vor viele Mythen und Gerüchte zu diesem Thema. Wir klären heute die Fragen, welches Ziel Spamtraps verfolgen, welchen Einfluss sie auf die Zustellbarkeit haben, ob sie wirklich automatisch E-Mails bzw. in E-Mails enthaltene Links öffnen und vor allem – wie man in der Mailingliste befindliche Spamtraps wieder los wird!

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Blog

Caching vs. Tracking: Meaning and measurement of open rates in e-mail marketing

For most marketers, open rate is one of the most important metrics. But why is this the case? And how is open rate mesured? Are high deviations between the different ISPs (e.g. Yahoo, Hotmail) a reason to worry?

In December 2013, GMail announced an interesting update: Image Caching was introduced. Per default, images should be displayed (instead of suppressed as before). For security reasons, images should be scanned for malware , therefore caching was a necessary measure to be taken.

A tracking pixel is a transparent image of 1×1 pixel size. With it’s help, openings and META-data like geo-location can be tracked.