ZeroDrop (@zerodrop)

Mailtrap Alternatives in 2026: When You Need Real Delivery, Not a Fake SMTP Server

Your E2E suite is green. Every signup test passes, every password-reset email renders beautifully in the Mailtrap dashboard. Then a teammate rotates the SendGrid API key, staging quietly starts return

Sep 6 · 7 min readzerodrop.hashnode.dev

Claude Code shipped a sandbox. Here's what it protects — and what it doesn't.

Anthropic shipped OS-level sandboxing for Claude Code. If you run an agent against a repo you care about, it's worth understanding precisely what moved — because a fair amount of the commentary treats

Aug 4 · 8 min readzerodrop.hashnode.dev

RSpec Email Testing Without MailCatcher

Rails developers test email one of three ways, and each verifies something different. ActionMailer::Base.deliveries — the test adapter collects would-be emails in an array, and you assert against it.

Aug 3 · 6 min readzerodrop.hashnode.dev

How to let AI agents verify email signups

An AI coding agent can scaffold a signup flow in about ninety seconds. Route, form, validation, a call to Resend, a token in the database. Then it stops. It stops because the next step is open the inb

Jul 22 · 5 min readzerodrop.hashnode.dev

I asked an AI agent to delete a folder my tool was guarding. Here's everything that went wrong.

I build Termaxa, a small Rust CLI that gates the shell commands AI coding agents run: it previews what a command will actually do, backs up first, applies an allow/ask/deny policy, and logs everything

Jul 17 · 8 min readzerodrop.hashnode.dev

ZeroDrop

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ZeroDrop's blogs

Mailtrap Alternatives in 2026: When You Need Real Delivery, Not a Fake SMTP Server

Claude Code shipped a sandbox. Here's what it protects — and what it doesn't.

RSpec Email Testing Without MailCatcher

How to let AI agents verify email signups

I asked an AI agent to delete a folder my tool was guarding. Here's everything that went wrong.

ZeroDrop

About

Available for

ZeroDrop's blogs

Mailtrap Alternatives in 2026: When You Need Real Delivery, Not a Fake SMTP Server

Claude Code shipped a sandbox. Here's what it protects — and what it doesn't.

RSpec Email Testing Without MailCatcher

How to let AI agents verify email signups

I asked an AI agent to delete a folder my tool was guarding. Here's everything that went wrong.

ZeroDrop

About

Available for

ZeroDrop's blogs

Mailtrap Alternatives in 2026: When You Need Real Delivery, Not a Fake SMTP Server

Claude Code shipped a sandbox. Here's what it protects — and what it doesn't.

RSpec Email Testing Without MailCatcher

How to let AI agents verify email signups

I asked an AI agent to delete a folder my tool was guarding. Here's everything that went wrong.

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ZeroDrop

About

Available for

ZeroDrop's blogs

Mailtrap Alternatives in 2026: When You Need Real Delivery, Not a Fake SMTP Server

Claude Code shipped a sandbox. Here's what it protects — and what it doesn't.

RSpec Email Testing Without MailCatcher

How to let AI agents verify email signups

I asked an AI agent to delete a folder my tool was guarding. Here's everything that went wrong.