• 0 2011.12.11 / Viktor Petersson / 6:13

    How does dual deliver/split delivery work?

    One thing that many people are confused about is dual delivery (aka split delivery). Simply put, this means that emails will be delivered to two email systems simultaneously. This is often used to keep a new and a legacy system live in parallel. It is also frequently used during email migrations to ensure that no downtime occurs.

    The concept of dual delivery isn’t very hard to wrap your head around, but how does it work? When reading forums, some people are confused about this. Some people think that it is sufficient to have two servers with the same priority level in the MX-record. This is not the case. Simply having two MX-records with the same priority will load balance between the two, but not deliver to both.
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  • 7 2011.12.05 / Viktor Petersson / 5:49

    Understanding email routing (i.e. MX-records)

    One of the most frequent questions we get through YippieMove relates to email routing. We touched briefly on this topic in the article Email 101 – An introduction to email under the hood. Yet, I feel the need to elaborate on this a bit more. In this article we’ll put IMAP and POP3 aside, as those are protocols for retrieving email, and has nothing to do with the routing of your email (which is a common misconception).
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  • 6 2010.06.09 / Viktor Petersson / 16:05

    Email 101 – An introduction to email under the hood

    Many of the articles we post here assume that you are familiar with the email lingo and components. But what if you’re not? Where should you start?

    We’ve put together this crash course for you. In this article I will try to focus on the user facing aspect, and not dive too deep into technical details. I will try to simplify things as much as possible. I’ve broken this article into two sections: ‘Sending Email’ and ‘Retrieving Email.’ Let’s start with the latter.
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