When a mailbox provider rejects or defers an email it sends back a message explaining why. Those messages begin with a three digit number (starting with a “5” for rejections and a “4” for deferrals), followed by text that explains why the mail wasn’t accepted. That text often contains a link to follow for more information, or a mailbox provider specific code you can...
Next Let’s Talk session is June 17 with the topic of bounce handling. As always: 5pm Dublin, noon Eastern, 9am Pacific. Send an email to laura-ddiscuss@ the obvious.
We have notes from previous calls:
Engagement Google Doc
Spamtraps Google Doc
FBL Google Doc
Looking forward to talking to everyone!
The nice folks over at Postmark shared a new deliverability resource last week. The SMTP Field Manual. This is a collection of SMTP responses they’ve seen in the wild. This is a useful resource. They’re also collecting responses from other senders, meaning we can crowdsource a useful resource for email deliverability folks.
Bounces and bounce handling is one of those topics I’ve avoided writing about for a long time. Part of my avoidance is because there are decades of confusing terminology that hasn’t ever been really defined. Untangling that terminology is the first step to being able to talk sensibly about what to do. Instead of writing a giant long post, I can break it into smaller, more focused...
Over the past few years a number of email delivery products have been launched. Many of these products are intended to improve deliverability by improving metrics. The problem is they don’t work the way their purchasers thing. Take data hygiene services. For the most part, these services take a list of email addresses, do data analysis and magic and then return a “clean” list to...
April was a big travel month for us. I went to Las Vegas for meetings around the Email Innovations Summit and to New Orleans, where Steve spoke on the closing keynote panel for the EEC conference. I wrote several posts this month about privacy and tracking, both in email and in other online contexts. It’s increasingly a fact of life that our behaviors are tracked, and I wrote about the need for...
It’s that time again… here’s a look at our last month of blog posts. We find it useful to recap each month, both to track trends and issues in email delivery and to provide a handy summary for those who aren’t following along breathlessly every single day. Let us know if you find it useful too! As always, I wrote about email filters. It’s so important to recognize that filters aren’t arbitrary...
Last night (Mar 29, 2017) between about 8pm Eastern and 9:30pm Eastern AOL suffered a technical issue. Every email sent to them received a “Recipient address rejected” reply. One example of the error message: Mar 29 20:45:12 p2-lvmail11 lsb1-99-208-250/smtp[22251]: A88DFC2DBE9: to=<redacted@aol.com>, relay=mailin-01.mx.aol.com[64. 12.91.195]:25, delay=0.18, delays=0.01/0/0.14/0...
Sometimes I find it hard to find a new topic to write about. I decide I’m going to write about X and then realize I did, often more than once. Other times I think I can blog about some issue only to realize that it’s too complex to handle in a quick post. There are concepts or issues that need background or I have to work a little harder to explain them. One thing I haven’t...
We started the month with some conversations about best practices, both generally looking at the sort of best practices people follow (or don’t) as well as some specific practices we wanted to look at in more depth. Three for this month: Be gracious with opt-out requests. Email marketing is hard. Even when it’s successful, response rates can be very low. It is surely frustrating to hear from...
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