A question came up on the email geeks slack channel (Join Here) about SenderID. They recently had a customer ask for SenderID authentication. We’ve written about it a few times: (Hotmail moves to SPF Authentication and Until it stops moving) but we’ve not actually stated the reasons why in a post. SenderID was basically SPF version 2. It tried to use the same mechanism as SPF to...
When asking a for assistance with email delivery, there are some pieces of information that are required before anyone can help. Be prepared with the information so you can get timely assistance. This advice is true whether you’re looking for help from peers or working with paid deliverability consultants. What is the problem? Be very specific about the problem you see. The fix for mail...
When it comes to SPF records there seems to be a lot of confusion. I mean, a decade after I posted it Authenticating SPF is still the most frequently visited post on the site. And, of course, there are hundreds of other pages out there that discuss SPF and what to publish. Still, there are common questions. Most recently I’ve been addressing questions about what SPF records need to be...
A few weeks ago I wrote a blog post focusing on one small part of bounce handling. Today I want to talk about delivery failures that aren’t bounces. This is really the biggest issue for companies who have written their own bulk sending servers. Modern bulk MTA appliances and ESPs correctly handle these types of bounces. However, when you’re troubleshooting it’s important to know...
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...
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