ISP Deliverability Guide: Gmail
Launched over fifteen years ago, Gmail has grown from the "new kid on the block" into a position of prominence. Depending on what...Read More
ISP Deliverability Guide: Microsoft OLC
It was originally called Hotmail. You might call it Outlook.com. I suspect the best name might be "Microsoft OLC" (Outlook Consum...Read More
ISP Deliverability Guide: Yahoo/AOL/Verizon
Once called Verizon Media Group, but now back to the more familiar name of Yahoo Inc. , you might know them as internet service providers AO...Read More
How the military made Spam an iconic American brand
I hope everybody survived Black Friday and Cyber Monday! It's still a busy week but when you've got things under control, why not ta...Read More
Best Practices on Domain Name Choices: What TLD should I use?
As a follow up to my previous post on domain name choice best practices , here's an additional two cents I wanted to share. Because I ge...Read More
Egypt’s economic court fines insecticide company for SMS spam
Sometimes those of us with a quite-possibly-myopic worldview might assume that outside of North America and Europe, spam regulation doesn...Read More
Yahoo Groups is changing
The folks behind Yahoo Groups sent out a notice a couple of days ago indicating that they are making changes to Yahoo Groups. They say that...Read More
SPAM Alert!
Not that kind--the other kind! From Minneapolis-St. Paul Magazine: Trendy chefs are celebrating SPAM coast-to-coast, and they’re leaving us...Read More
Can I use FOIA to source lists?
Sure! It's legal. Is it wise? Um....let's skip that point for a moment. Let's start with, "it's legal!" What doe...Read More
Google: No favors at Gmail
Tulsi Gabbard's presidential campaign is suing Google for various reasons, primarily for suspending her Google Adwords account. Not real...Read More
Best Practices on Domain Name Choices
If you're going to use your domain (or a custom domain) with an email platform, try, if at all possible, to use your main domain name. ...Read More
Another day, another dead DNSBL
Another anti-spam blacklist has ceased to exist. For more on the now-defunct Email Basura blacklist, head over to DNSBL Resource .Read More
New XNND DNS Tool Update!
I've updated the XNND DNS lookup tool so that it you can now select "Multi DNS = yes" and the tool will now make the same DNS...Read More
Sender ID is back!! No, wait...
Gossip has been flowing through the back channels lately suggesting that Microsoft might be checking Sender ID email authentication DNS reco...Read More
Dead email domain: ono.com
It appears that the email domain ono.com is going away. ONO was a Spanish broadband communication and entertainment company, purchased by Vo...Read More
How not to get people to open your emails
Email Compliance manager Skyler Holobach explains why you shouldn't act on clickbait advice you find on the internet. Read more >>Read More
Charter/Roadrunner bounces?
I'm pulling together information from various sources here, and using a bit of guesswork. So keep in mind that this info is not guarante...Read More
How Email Spam Filters Work Based On Algorithms
This is pretty basic stuff; it's not inaccurate, but it's not complete. Most other ISPs have other things going on that can also res...Read More
Need example SMTP bounces for different ISPs?
Wondering what different kind of bounces an ISP might give to you? Postmark put together this handy-dandy SMTP bounce example lookup tool. I...Read More
Spamhaus Blocklist Changes
Speaking of Spamhaus, this just popped up in my RSS feed reader. It looks like Spamhaus is going to take a harder stance against users who ...Read More
Blacklists and multi-client impact: The risk is real
You hear stories sometimes. About how when a deliverability person warns sales that they shouldn't sign that client, but the client come...Read More
Let's go buy a list!
Is buying an email list a good idea? Let's ask around. Hubspot's got the best quick summary, in my opinion. They say buying an e...Read More
HOWTO: Work around Office 365 Unblocking Issues
If you've previously seen this bounce message: 5.7.606 Access denied, banned sending IP [1.2.3.4]. To request removal from this list p...Read More
What about AOL?
If you're wondering if AOL still exists as a separate entity, the answer is no. AOL as a standalone ISP is no more. What was AOL is no...Read More
SPF and DKIM Alignment: What are they and why do they matter?
If you have implemented DMARC for your email sending domain, the spec requires that your messages either pass "SPF alignment" or &...Read More
Is email spam a solved problem?
Engadget asks, " Did AI kill off spam and we just didn’t notice? " I'm not sure about THAT, but this article is still a very...Read More
BIMI: Current Status? Should we bother?
Since lots of folks are reaching out to me, asking for help with BIMI records and/or wondering if it's something they should take the ti...Read More
ARS Technica: How to read email headers
Here's a not totally bad guide from ARS Technica on how to read email headers. It's worth reading (and bookmarking for future refer...Read More
BIMI Moves Forward as Google Commits to Pilot Program
It looks like Gmail will have support for BIMI! As announced by Agari, Google will be running a BIMI pilot program soon. Read all about it h...Read More
Google Postmaster Tools doesn’t like us. How can I fix it?
Are you struggling with how to improve your sending reputation in Google Postmaster Tools? 250ok's LoriBeth Blair just published a very ...Read More
Mailkit's BIMI Inspector Tool
Trying to publish a BIMI record? Wondering if you've done it correctly? Mailkit has this cool new tool in beta that will help you check...Read More
AOL & Yahoo Mailbox Merger: It’s Done!
Verizon Media (aka Oath, aka Yahoo & AOL) folks report that the merger of the AOL user base into the Yahoo Mail infrastructure is compl...Read More
When Gmail Was First Announced, People Thought It Was an April Fools' Joke
Gmail just turned 15 years old! Hard to believe that when it was announced on April 1, 2004, some people actually thought it was an April Fo...Read More
AMP: The next big thing?
AMP (short for “Accelerated Mobile Pages") is a method to place dynamic content in email messages, announced by Google , now supported ...Read More
How Do I Avoid the Spam Filter?
Savvy deliverability expert Karen Balle answers a common but important question: How do I avoid the spam filter ? And follows it up with a s...Read More
Hello, Verizon Media Postmaster!
Verizon Media (previously known as OATH, previously known as Yahoo, previously known as AOL) has just launched their new Postmaster Site . C...Read More
The latest trend at D.C. restaurants? Spam. And it’s delicious.
Sometimes you get tired of working on email spam and just want to go out to dinner. To eat ... spam? Read about spam musubi and more courte...Read More
How to Make Sure Important Emails Stay Out of Your Spam Folder
Today, Gizmodo explains how to train Gmail, Outlook/Windows Mail, and Apple Mail on what shouldn't be considered spam. They left out ...Read More
GPT Downtime
Over on the Mailop list (ignore the SSL warning, that is a long-standing issue), people are noting that Google Postmaster Tools has been mi...Read More
DMARC Policies Up 250% In 2018
Look at the explosive growth of DMARC implementations! This is great to see. Read more about it over on dmarc.org .Read More
Gmail SPF Status of Best Guess: What does it mean?
If, like me, you use Gmail to test and check email authentication results, then you're used to seeing SPF results that say pass or fail....Read More
Gmail: Improving spam filtering with TensorFlow
Google just announced today how they've improved spam filtering using TensorFlow . What's TensorFlow, you might ask? "An open...Read More
2018: Did I get it right?
Just over a year ago I predicted that 2018 would be a year full of mailbox provider consolidation, many folks implementing DMARC, and ISP f...Read More
Fun while it lasted...
Remember back in September when I blogged about how to create a Google+ account to make your brand icon display next to your emails when se...Read More
Stop using NJABL! Now!
I just replied to an email from a guy who thinks I'm blocking his mail. I'm not, because I don't run a blacklist or a spam filte...Read More
Characters in the local part of an email address
Need a "common sense" breakdown showing you what characters should be allowed in the username part (local part) of an email addres...Read More
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