Email, tech and security blog

How to test SMTP servers using the command-line

By | September 20th, 2016|Categories: Blog|Tags: , |

In certain situations it can be very helpful to be able to quickly check if a SMTP server is online and reachable, has support for TLS and that it’s working, test user authentication and measure transaction delays and throughput. All of this and more can be done quickly using the command-line. Here’s your guide! […]

What to remember when you hate on spam

By | September 13th, 2016|Categories: Blog|Tags: |

Did you open your mailbox this morning, only to find a few more of those obnoxious spam emails? Did you react with an irritated frown and a thought about that you are paying for some service to keep this shit out? Don’t worry, it’s perfectly normal. In fact, so did I. […]

Why everybody should use DMARC to prevent phishing

By | September 8th, 2016|Categories: Blog|Tags: , |

Email is a major source of phishing and malware attacks. The Locky ransomware solely contributed to a 412% increase of malware emails in March compared to February, according to CYREN’s May 2016 cyberthreat report. While I believe that awareness and training is the most universally effective counter-measure, even that is really difficult, according to this recent study. We probably need a combination of training and technological advancements. One of the latter has to do with email authenticity. Can you trust an email’s sender adress? Generally no, but you can with DMARC. […]

It’s all about freedom and trust at #OXS16 in Frankfurt

By | September 1st, 2016|Categories: Blog, Events|

Open-Xchange Summit, OXS16, in Frankfurt brings together the service provider industry for keynotes, workshops and technology exchanges that is driving value and growth. October 13-14 will be nothing short of amazing. […]

Traveling from Ace to Monaco (editor)

By | August 16th, 2016|Categories: Blog|Tags: |

Microsoft revealed a project called “Monaco” in November 2013 as a part of the online version of Visual Studio. A few years later, the open source Visual Studio Code editor was released, which also used it as foundation. Finally, in June 2016, Microsoft released a standalone version of the Monaco Editor on GitHub. […]

Meet Halon at HostingCon, New Orleans

By | July 4th, 2016|Categories: Blog, Events|

Under the scorching sun, where pots of culture, food and music come to life, this is where we will meet! On July 24th until 27th 2016 HostingCon hits New Orleans, Louisiana. Come join us and enjoy the latest updates from us at Halon and our friends and partners in the industry. […]

When HSL got objects

By | June 28th, 2016|Categories: Blog|Tags: |

It’s time for yet another deep dive into our platform. This time we’re going to tell you about when and why HSL got classes with closures. It started when we revisited our MIME implementation. The MIME implementation was kind of basic, but served most people well. However, it could at the time only work on the top level MIME objects header and all MIME parts were simply addresses by IDs. Although the structure of MIME is highly nested with children and siblings and all MIME parts share the same features, there is a header and a body-part (which could be even more MIME parts). This data structure is ideal to be represented as objects in a tree structure; which got us started to sketch how we really wanted you to work with MIME objects. […]

Using reCAPTCHA to handle spam misclassification

By | May 19th, 2016|Categories: Blog|Tags: , , |

Today’s leading spam filter technologies offer a very high degree of accuracy. In this blog I’ll describe the current state of spam classification, and propose a pretty innovative method that can significantly improve both senders’ and recipients’ satisfaction (as well as reducing the burden on administrators and support staff) by enabling senders to report false positives if they pass a CAPTCHA test. Let’s start by familiarising ourselves with the history of anti-spam. […]

Join us at the-must-attend-event: World Hosting Days in USA

By | May 11th, 2016|Categories: Blog, Events|

On May 25 until 26th it’s finally time for World Hosting Days in the USA – the event famous for the never-ending hospitality, the lovely remote locations (remote – to maximize the ace networking events) and the premium quality keynotes, sessions and content. We cant wait and now we would like to invite you to join us. […]

What’s new in Halon 3.5 “sunny”

By | April 21st, 2016|Categories: Blog|Tags: , |

Photo by Reginald Pentinio Spring is here, and so is the 3.5 release (codename sunny) of the Halon SMTP software! It includes major features such as an IDE-style script editor and object orientation, is based on FreeBSD 10.3 and comes with the latest quarterly packages. In other words, this release marks another milestone for Halon’s developer friendliness. […]

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