(See new info at end!) Hey, big senders! It's time for another update regarding enhanced sender requirements put forth by a large mailbox provider. This time around, it is French mailbox pro…
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If you’ve run into a DKIM failure with the error "dkim=fail (no key for signature)" in the authentication results header, you’re probably wondering what’s wrong and how…
Author Domain Signing Practices (ADSP) is an add-on to DKIM email authentication. It provided domain owners with the ability to define a policy that asks mailbox providers to di…
For last week's Tuesday Tip , I shared my top five recommendations for DKIM best practices. Mostly (hopefully) easy things you can implement in your DKIM consideration, or nu…
DomainKeys Identified Mail (DKIM) is a most excellent authentication protocol for email messages. It's a great way to affirm that the domain referenced in the email signatur…
Finally! It's time for another Spam Resource Tuesday Tip. The goal? To share short and actionable deliverability tips and tricks. More often simple hacks than deep deliverabi…
A reader on the Mailop list pointed out that the Debian Linux wiki has a page for OpenDKIM and that this page can be interpreted as offering a suggestion to implement the "…
Last week on the Valimail blog, I shared a status update on the DKIM L= tag vulnerability that allowed bad guys to repurpose signed email messages, replace or append their own b…
The messaging around inbox placement and authentication has always been nuanced, and it's easy to misunderstand. To be clear, email authentication doesn't guarantee inbox…
I grant you that this is a niche one. Will this tip be helpful to millions? No….but. Hey, it's my blog. Anyway: Do you manage your own email sending platform? Is it a home gr…
On Friday, May 17, 2024, security researchers from ZONE published details of a vulnerability inherent to the DomainKeys Identified Mail (DKIM) email authentication protocol – on…
Have you ever run across the domains onmicrosoft.com and gappssmtp.com in email headers before? Wondering what they are for and why they are there? Read on! In this modern age wh…
This may not be super scientific, but it is something I'm going to have fun with nonetheless. Let's take the last thirteen days worth of spam sent to spamtrap addresses i…
The other day I was doing a mini-consult for a marketing sender who uses one of those Marketing Clouds to send their mail, and the client's IT representative challenged my po…
Today's data question: What if we scanned the top one million domains, looking for DMARC records and DKIM records misconfigured so that they're living at the top level of…
It's time for another Webinar Rewind! Recently I presented (alongside Jesse Kennedy) a live webinar specifically meant to help AWeber users get up to speed on the new sender …
As you well know, Gmail and Yahoo Mail are now requiring that all senders start to publish a DMARC record , if they weren't publishing one already. Hopefully you watched the …
If you dig into the newly published upcoming sender requirements from Google , you'll unearth three points that relate to DMARC. These are important enough that I wanted to h…
Gmail has long pushed for adoption of email authentication best practices from email senders, effectively making it tough to get to the inbox without proper email authentication …
If you're seeing intermittent DKIM authentication failures at Microsoft domains (outlook.com, hotmail.com, etc.) -- meaning you're seeing "dkim=fail (body hash did n…
