General Insights on Email Infrastructure and Deliverability
Case study Xsarus: reliable email is crucial
2015/08/05 by Willem Stam.
Xsarus is a supplier of web applications and e-commerce applications, both of which need a well-oiled, reliable email system. Xsarus has found the solution by obtaining a PowerMTA based, bulk email sending system, says Xsarus partner Bram Hoekman. “We used to work with Postfix, a popular mail server. One of Postfix’s advantages is that it […]
Categories: Case Studies, General
Deliverability Alert: Orange implements Spam-report based Dynamic Filtering
2015/05/05 by Jérôme Gays.
As SFR did a few weeks ago, it seems that Orange follows the same path towards implementing an email dynamic filtering based on the volume of the generated complaints. This Deliverability Alert is indeed managed by VadeRetro. The anti Spam solution deployed by the main ISP’s and French Webmails, including Orange, SFR, Free and laposte.net. […]
Categories: Deliverability, General
Deliverability update: SFR on his way to a stringent filtering process
2015/04/01 by Jérôme Gays.
Through the last few days we have noticed — via our customer’s deliverability monitoring infrastructure — SFR’s enhancement of its filtering policies. For instance, we notice a bigger number of the ‘550.5.7.1 Message Content rejected’ messages after running the DATA command during SMPT dialogs. As far we can see, this enhancement is based on the […]
Categories: General
Message Systems acquires Port25 (PowerMTA)
2015/02/23 by Jérôme Gays.
Two weeks ago, Message Systems announced the acquisition of Port25, marker of the popular PowerMTA. Message Systems is the world’s main supplier of emailing infrastructures, running circa 20% of the world’s legitimate email. This purchase means an important milestone in the email sending arena. Both enterprises offer on-premise solutions to the world’s most massive emailing […]
What are the most important blacklists and how do you know if you are listed?
2015/02/02 by Jérôme Gays.
If you are reading this blog, you certainly know what a blacklist is. Nevertheless, we think it’s important to remember their significance in the email world and their impact on your deliverability. Blacklists are often referred to in different ways: RBL for Real-time Blackhole List or DNSBL for DNS blacklist. These terms all refer to […]
Categories: General
PowerMTA High Volume Sending and Email Authentication
2014/04/24 by Jérôme Gays.
So you decided to take the path of in-house deliverability (see our article regarding this topic), but there is one more thing to think about: Which is the sending solution to pick out from the others? By Postmastery, we made up our mind and decided — as well as becoming both an authorized retailer and […]
Email domains best practices
2013/02/08 by Maarten Oelering.
Email domains are important for identification, trust and reputation. But emails can embed many domains used for different purposes. They are listed below: IP hostname Envelope sender domain From header domain Reply-To header domain Sender header domain Message-ID domain DKIM signing domain Image URI domain(s) Link URI domain(s) This post provides some background on these […]
Categories: Authentication, Deliverability, General