Two come to mind.
I circulated an event email test to some internal stakeholders. One had several small text edits, so the easiest way to get those edits into the email was just to copy and paste her version into my editor and move on with my life. ... Of course, I neglected to acknowledge that the email copy had a first name personalization in it, so, I ended up calling ~5K people in Seattle "Catherine" which I didn't realize until the replies started coming in. This was my first major email fail, so, it was super scary to realize what sort of power the Send button can hold.
Also...being the guy who presses Send for Litmus is impossibly scary just about all the time, mostly because I know how ruthless the Litmus community will be if anything we send ever contains an error ;) On one of our recent sends, I noticed one of the variants had a typo in it. (Which, interestingly, none of your beloved Litmus marketing team caught in the review process—calling you out, Jason, Justine, Kevin and Lauren!) The email was already scheduled, and set to go out 2 minutes later. Luckily, I was able to cancel the send and get the typo fixed...but had about 67 heart attacks in the span of those 2 minutes.
Hey Jon - Here's a guide we put together here at Litmus earlier this year: https://litmus.com/blog/the-ultimate-guide-to-email-image-blocking
According to the Gmail anti-abuse team, their definition of spam changes every few minutes. :) (https://wordtothewise.com/2014/02/isps-speak-at-m3aawg/)
Haven't noticed any issues, but also didn't send any campaigns today.
I just checked Elliot's theory, which I thought would probably account for it.
Unfortunately (for this scenario), MailChimp also counts a click as an inferred open ... So, the open rates are definitely an apples-to-apples comparison technically-speaking.
You definitely need to focus on being as aggressive as possible with on-site email acquisition forms. I know a lot of marketers and designers tend to hate pop-over acquisition forms...but...the numbers tend to prove that they're quite effective.
Thanks to everyone for your responses so far! :)
Re: @Tyler: "In all of my coding jobs, I'm really thankful for my architecture background that still shapes how I approach my design and development."
That's exactly in line with the thesis I'm working on, and the reason I started this thread. I'm interested to learn more about people who came from other fields, and how they're now applying those skills to marketing, design and development. Thanks for sharing!