Spam Resource: All Things Deliverability

Published Monday, September 29, 2025 by Al Iverson. Click here to subscribe.

Hey, friend! It's that time again!

The one constant in the universe? Change! And change is coming to Google Postmaster Tools. Read on to learn more.

This Week's Featured Story

Google: Changes coming to GPT
If you're somebody who pays close attention to reputation data, and you utilize Google's Postmaster Tools (GPT) data to monitor for and help remediate Gmail deliverability and reputation issues, then you'll want to make note: changes are coming: Google has just posted new information documenting coming changes to GPT.

And More to Read

Deliverability AMA for Civic Shout
I'm excited to announce an upcoming deliverability-focused Ask Me Anything for the Civic Shout Newsletter! Allow me to give you an overview here in video form, or below that in the blog post text!

DELIVTERMS: Pre-header
It's time for another entry in the DELIVTERMS series here on Spam Resource, where we define deliverability and email technology terms to help make them easier for email senders to understand. Today, we're tackling a marketing term, specifically, explaining what we're referring to when talking about an email message's “pre-header.” ...

Plus A Bonus Article From the Archives (June 2024)

Cool tool: ESP Finder by Sendview
What does Sendview do? As they describe it, they provide "Competitor tracking built for email marketers." (It reminds me of what eDatasource was when it first started.)

That's all for now. Got an idea for a future story? Or an email question that I could answer in a blog post? Or just want to share feedback? Please feel free to reply! 😊

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Mailing address: 1522 W Jarvis Ave, Chicago IL 60626. I am not a lawyer and this is not legal advice. Duh. All opinions are mine alone and do not necessarily represent the views of any group, company, organization or other person. No chimps, bees or clouds were harmed in the crafting of this 100% artisanal and protein free email newsletter.