The problem with email
Your inbox is broken.
By design.
Not because spam filters don't exist. Because the people building them have different priorities than you do.
The fragmentation problem
You have too many inboxes and no way to control them all
Most people today have at least two or three email addresses. A personal Gmail. An iCloud account tied to Apple. Maybe a work address, an old Outlook account that still gets mail, or a separate inbox for shopping so brands can't find you.
Each of these lives in its own silo. Each has its own spam filter. Each has its own rules engine, its own UI, its own logic. And none of them talk to each other.
So when a recruiter finds you, they hit every address. When a newsletter signs you up without asking, it lands wherever they got your email. When AI-generated cold outreach arrives, it bypasses each platform's filters independently, finding the path of least resistance.
You're playing defense on five fronts simultaneously, with no unified command.
The "helpful AI" problem
Big email providers are reading your inbox. And calling it a feature.
Gmail has AI. Outlook has Copilot. Apple is adding intelligence to Mail. Every major email provider is racing to announce that their servers will now read, classify, and act on your email using AI.
The pitch is convenience. The reality is that your most personal communications, your financial alerts, your medical correspondence, your private conversations, are now being piped through models running on corporate infrastructure, logged in ways you can't inspect, and used for purposes that are buried in a privacy policy you never read.
You didn't choose that. You didn't configure it. You can't turn it off without switching providers. And even if you did, the next inbox you switch to is building the same thing.
The industry has decided that AI access to your email is opt-out. We think it should be opt-in, on your terms, with your tools.
The rules problem
You can't tell your email what you actually want
Gmail lets you create filters. They're clunky, they don't use AI, and they're per-account. iCloud's rules are barebones. Outlook's are better but still limited.
None of them let you say "archive anything that sounds like a recruiter message" or "trash cold emails that use AI-generated personalization" or "route all shipping notifications to a folder across all my accounts."
And if you could somehow configure that in one place, you'd have to rebuild the exact same ruleset in three other accounts. Then maintain them separately. Then wonder why something slipped through on the inbox you forgot to update.
The rules you want to write don't fit the tools you've been given.
What Premail does
One set of rules. Every inbox. Your machine. Your AI.
Premail is a companion app for Mac, Windows, and Linux that runs quietly in the background, next to whatever email client you already use. It is not a plugin, not an extension, and not a replacement for Gmail, Outlook, or Apple Mail. You connect your accounts once, write your rules in plain English, and Premail defends every inbox from that moment forward without changing how you check email.
The AI that classifies your email runs through your own API key, your own Ollama instance, or not at all for non-AI rules. Premail is never in the middle. No email text passes through our servers. We have no servers processing your private data. There is no Premail account. Nothing you do in the app touches us.
When a new email arrives, Premail evaluates it against your rules, assigns a confidence score, and silently acts on it before you ever open your inbox. It archives the recruiter. It trashes the cold pitch. It routes the shipping notification. You see none of it unless you want to.
It also keeps itself current. Premail checks for new versions in the background and, when one is ready, shows a quiet Update button rather than interrupting you. Click it and the new version is downloaded, its signature verified, installed, and relaunched in place. No reinstalling, no hunting for a download, and nothing updates without your say-so.
How it works
Rules that answer one question: what would you do?
Every Premail rule answers the same question: what would you normally do with this email by hand? Archive the recruiter pitch. Trash the AI cold outreach. File the shipping notification in a folder. Premail takes that same action, automatically, the moment new mail arrives.
Because Premail is a companion app and not a plugin, it works alongside whatever email client you already use. Your client and Premail are both watching the same inbox. Most of the time Premail gets to a message first and you never see it. Occasionally your client gets there first and a message may appear in your inbox for a moment before Premail handles it. Either way the end result is the same: only the things that matter stay.
Who's behind it
Built by one developer who got tired of the same problems

Premail is built by Matt Senter, an independent developer who has spent years watching his own inboxes pile up across Gmail, iCloud, and Outlook. Premail is the tool he wanted for himself: one place to write rules, every account defended, nothing sent to anyone else's servers.
No team, no investors, no growth team optimizing for engagement. Just one person shipping the app, reading the feedback, and fixing the bugs.
Check out his other projects:
- StockCar. An iPhone app that turns your stock, crypto, and forex holdings into personalized AI-generated podcast episodes, so you can catch up on your portfolio while you drive or walk the dog.
- Bee Ready. A youth sports training program that teaches kids lifesaving skills like CPR and AED use, building a generation of young athletes who are prepared, confident, and ready to step in when it matters.
- Comoji. Slack-style emojis for Mac, bringing those familiar custom emoji reactions to everything you type, system-wide.
The dream
An inbox that only shows you what matters
Imagine opening your inbox and finding only things that require your attention. Messages from people you know. Replies you're waiting on. Alerts that are actually urgent. Nothing else.
Not because you spent an hour on rules this morning. Not because you're constantly reporting spam and training a model that forgets next week. But because you set your preferences once, on your machine, and they apply everywhere, automatically, forever.
That's the inbox Premail is building toward. It's early. We're in alpha. But the foundation is there: local control, unified rules, AI that works for you and only you, applied silently across every address you own.
Your inbox, defended.