Gmail’s wide deployment of TLS

When talking about authentication and encryption technologies —such are SPF, DKIM, DMARC—, Gmail has always been at the cutting edge of the topic. After having implemented Google Postmaster (read our related article), it is therefore possible to monitor the percentage of Google’s outgoing and incoming emails TLS encrypted or not. Announced by Google last week, […]

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Categories: Authentication, General, PowerMTA

Email domains best practices

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 […]

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Categories: Authentication, Deliverability, General

What DMARC means for you

A week ago DMARC went public causing a tidal wave of publicity, discussion, and fuzz. Many senders are now asking what they should do with it. In this post I will try to put things in perspective, so senders can judge better what it means for them. First of all, DMARC is not something completely […]

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Categories: Authentication, DMARC, General

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