Stop Managing Your Inbox with AI. Build a Firewall Instead
The Gmail "plus addressing" technique that separates newsletters from real messages, and why I refuse to let AI touch my email
The "Owned Audience" Problem
The emails I actually want end up in spam. The ones I never plan to read sit in my inbox.
The “Owned Audience” model has turned the personal inbox into a marketing landfill. Creators and brands have figured out that the best way to “own” an audience is to own their email address. Every restaurant wants your email for “new menu updates.” Every brand runs marketing sequences designed to drive conversions. Even creators I genuinely like have turned my inbox into a testing ground for subject lines and click-through rates.
Email lists are portable. Platforms change algorithms, but a list provides direct access. Newsletter businesses are built on this foundation. When I find a creator I like, I often hesitate to subscribe because I know I won't read every single update.
This creates a friction point: we want the insights, but we refuse to manage the clutter.
So people turn to AI. Ask AI to manage their inbox. Ask AI to summarise emails. Ask AI to pick which emails to read.
But does that actually solve the problem?
The Hidden Cost of AI Assistance
Early research on AI in communication tools shows a “summary verification overhead.” People often open the original message to check what the AI omitted or distorted, which creates more friction instead of removing it. You don’t save time if you end up re‑reading the source to check the bot’s work.
I relate to Dheeraj Sharma’s note here:
Then there is the cost of privacy. AI email tools require full access to read, analyze, and categorize every message: work emails, personal conversations, and financial notifications.
I maintain a personal rule: I do not give AI access to my primary email.
More than half of Americans say AI does more to hurt than help when it comes to keeping their personal information private.
If you have lots of subscriptions on Substack, Karen Spinner deployed Substack Reader: a Chrome extension to help you take control.
This post will focus more on the holistic approach to handling your entire inbox in general.
Why a Second Gmail Account Failed
My first attempt was to bypass the noise with a secondary account. I wanted a separate space to batch-read when I had time (though that time rarely comes).
This failed because Google’s verification systems are increasingly hostile to new, non-primary accounts, especially for users in regions like Luxembourg. Google’s system rejected me at every turn.
But even if I had succeeded, a second account creates new problems:
You’re creating more work, not less. Splitting into multiple inboxes means another space to check, which productivity experts note often turns into a neglected silo. You’re not reducing cognitive load. You’re doubling it.
There’s no privacy gain. Google and other providers link accounts through devices, cookies, and IP addresses. Even a “separate” account is still correlated to your main identity. And when that address gets leaked, you have no way to trace which sender sold your data. All still share the same destination.
You’ve just moved the problem. A second account recreates the same marketing landfill in a different container. Every email still lands in one place, fighting for attention. You’ve built a second inbox to ignore.
The Plus Addressing Solution
This solution was already inside in my gmail inbox: plus addressing.
Gmail allows you to append a “plus” sign and any keyword to your username. For example: yourname+reading@gmail.com. To the sender’s server, it looks like a valid email address. To your inbox, it’s a unique identifier: a permanent digital tag you control. This creates a “firewall” for your data before an email even arrives.
Standard filters rely on “From” addresses, which change frequently. Filtering by a “plus” address is absolute because it relies on the destination, not the sender. You create a system based on what you control, rather than guessing what others will do.
How I Built the System
I used Gemini to structure the filter rules without ever giving it access to my actual emails.
Step 1: The Tag
I sign up for all newsletters using myname+reading@gmail.com instead of my primary address.
Step 2: The Rule
I created a Gmail filter where any email sent to myname+reading@gmail.com automatically:
Skips the Inbox (Archive it)
Applies a “Library” label
Is never marked as “Important”
This creates a “clean room” environment. If a newsletter hits my primary inbox, I know I didn’t use my tag or the sender is bypassing my system. If I receive spam to that specific address, I know exactly which database leaked my information.
How to Set It Up (5 Minutes)
If you want to try this yourself, here’s how:
Create your tag: Choose a keyword (e.g.,
+reading,+newsletters).Set up the Gmail filter: * Go to Gmail Settings → Filters and Blocked Addresses → Create a new filter.
In the “To” field, enter:
yourname+keyword@gmail.com.Select: “Skip the Inbox,” “Apply the label (Library),” and “Never mark it as important.”
Use the tagged address: Use this version for every new subscription.
Read on your schedule: Your primary inbox remains for work and relationships. Your “Library” label is for your consumption.
What This Actually Protects
The “owned audience” model assumes you will hand over your primary communication channel in exchange for content. But your inbox is where you coordinate work, manage relationships, and handle time-sensitive decisions.
Mixing these contexts means everything competes for your immediate attention. The vital becomes indistinguishable from the promotional. This system creates separation without the friction of managing multiple accounts. It returns the power of choice: you engage with content when you are ready, rather than allowing content to interrupt you at will.
Most importantly, it achieves this without requiring you to trust an AI with your private data.
On Strategic Tool Use
I used AI to help me find a solution that protects my inbox from AI. Gemini wrote the filter logic, but it never saw my messages. I controlled the information that went in, and I verified the rules that came out.
That is the distinction that matters: using tools strategically versus handing over control entirely.
The default assumption today is that convenience requires giving up privacy. That efficiency means letting algorithms decide what matters. This system proves you can have both.
Next time someone asks for your email to send you “valuable updates,” pause. Ask yourself: Do I want this in my primary inbox, or do I want to read it on my own schedule?
Then use the plus sign.
Voilà, thanks for being here,
Ting
💬 What’s your approach to managing digital boundaries? I’d love to hear in the comments.