ArchiveDecember 2019

Authentication

Some notes on some of the different protocols used for authentication and authentication-adjacent things in email. Some of this is oral history, and some of it may be contradicted by later or more public historical revision. SPF Associates an email with a domain that takes responsibility for it. Originally Sender Permitted From, now Sender Policy Framework. It allows a domain owner to announce...

Google IP reputation bad

This morning hundreds of delivery folks logged into their Google Postmaster Tools account to see their IP reputation was bad.

Even one of my client’s that is using a major ESP shared pools is seeing bad IP reputation on December 10, 2019.

The good news is this doesn’t seem to be affecting delivery. Most folks are reporting no delivery issues at Gmail and no change in open rates.

It’s not marketing… it’s harassment

Many years ago, we bought a VMWare license to manage the various virtual machines running our business infrastructure. As part of our move to Dublin, we decommissioned our cabinet and moved all of services into various bits of the cloud. This meant that when our VMWare support contract came up for renewal we declined the renewal. Despite no longer being customers and unsubscribing from email...

4 beelion emails

Sendgrid announced their volumes for Black Friday and Cyber Monday: To provide a clearer understanding of our scalable systems, on Black Friday 2019 we processed 4.1 billion emails and this Cyber Monday we processed 4.2 billion emails (46% more than 2018) and processed up to 315 million emails/hour (burst rate) into inboxes all around the world! To give you a better understanding of this scale...

It’s the email time of year…

I’m basically waiting for the various ESPs to announce Just How Much Mail they’ve sent over the last 4 days. Early information from one ESP shows a hefty percentage over the amount they sent last year, and that amount had many, many, many zeros in it.

In terms of best practices and ongoing advice: you can never put too many lights on a Christmas tree.

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