Spam Resource: All Things Deliverability
I'm Al Iverson, and I've been working in email technology for a good long while now. My areas of expertise? Email deliverability, SPF + DKIM + DMARC email authentication, email marketing best practices, dealing with blocklists, stopping spam and more. This blog (which now includes an email newsletter) began in 2001, and here we are, more than 1500 articles and over 4 million page views later. I hope you find this resource useful and thank you for reading!

2024 Sender Requirement Updates

Yahoogle

Auth: SPF, DKIM + DMARC

Mailbox Providers

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Let’s decode another acronym! DNS is a term not limited to email deliverability, but it sure does show up there quite a bit. And it stands for: Domain Name System. DNS is the pho…
Folks have been reporting these past few weeks that centralized subscription management is coming to Google’s Gmail . This is a change, and change is scary, so many people will h…
It’s that time again! Time to define more deliverability terminology, as we do every so often here in the DELIVTERMS series on Spam Resource. Today, let’s define email authentica…
Front, a " customer operations platform that helps teams streamline communication and deliver exceptional service at scale ," is hiring! They're looking for an emai…
My loss is your gain! I accidentally fumbled my DMARC record temporarily – locking everything down just a little too well for one of my domains – and then I sent an email to my t…
Just this week, Guy Hanson and Rafael Viana from Validity were joined by Microsoft's Jeff Dellapina and Mihai Costea in a live webinar talking about the current state-of-the-…
Who hosts what mail? MBP Spotlight is the series here at Spam Resource where I’ll share ranking data for the top mailbox providers (including B2B!) based on where they fall in …
Microsoft recently announced that Exchange Online -- the email (and calendar, contacts and tasks) functionality provided in Microsoft 365 and Office 365 , will be subject to outb…
Tony Patti has worked in the email sphere for more than twenty years. An expert deliverability consultant (and builder/manager of deliverability service consulting as a practice)…
Have you ever seen this SMTP error message? 450 4.2.1 The user you are trying to contact is receiving mail at a rate that prevents additional messages from being delivered. Pleas…
Who hosts what mail? MBP Spotlight is the new series here at Spam Resource where I’ll share ranking data for the top mailbox providers (including B2B!) based on where they fall…
Hey, look what I stumbled across ! Chris Zullo, Salesforce Consultant and  Business Puzzle Solver , did a most excellent job capturing my 2020 presentation on deliverability for …