Idempotency Lessons From an Email Agent
A customer emails your support agent at 9:14 a.m. At 9:15 they get a helpful reply. At 9:16 they get the same reply again, word for word. Nothing cras…
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The CLI-First Way to Manage Agent Accounts
There's a specific kind of friction in provisioning infrastructure through a web UI: you're building an automated system, but step one is clicking thr…
Spam Detection for Inbound Agent Mail
Spam aimed at a human wastes attention; spam aimed at an autonomous agent becomes input — so filter it before the model ever sees it: curl --request P…
Auditing What Your Email Agent Actually Did
Debugging a misbehaving email agent at 2am is a special kind of miserable. Your application logs say the LLM "decided to follow up." Cool — with whom?…
Track Email Opens From Your Agent's Outreach
You built an outreach agent, it sent 80 follow-ups this week, and you have no idea what happened to any of them. Did the prospect open the message? Cl…
CRM Enrichment From an Agent-Owned Inbox
The best contact-enrichment vendor you'll ever use is the bottom three lines of the emails already sitting in your inbox. Roughly 82% of business emai…
E-Commerce Order Support With an Agent Mailbox
A helpdesk widget waits for customers to come to you; the support inbox is where they already went. Order status questions, return requests, shipping …
Monitor a Support Inbox and Open Tickets Automatically
Before: a customer emails "production is down" at 11pm, the message sits unread until someone opens the shared inbox at 8am, gets forwarded to the wro…
Meeting Follow-Ups Without a Human in the Loop
Every team has a version of this story. The meeting ends, somebody says "I'll send the recap," everyone nods, and three days later a decision nobody w…
Recruiting Agent: Interview Scheduling Pipeline
A candidate finishes your take-home on a Friday afternoon. By the time a recruiter has cross-referenced three interviewers' calendars and emailed back…
Build a ChatGPT-Style Email Plugin
Here's how the story usually goes. Saturday afternoon, you wire a language model to a mailbox for the first time. You type "summarize my unread mail" …
Import Email Signatures Into Your CRM With an Agent
Email signatures are the most valuable dataset your CRM is throwing away. Roughly 82% of business email carries a signature with at least a name and t…
Migrating From Transactional Email to Agent Accounts
This is what most agent email code looks like today: // SendGrid / Resend / Postmark — outbound only await sendgrid . send ({ to : " prospect@example.…
Stop Your Agent From Replying Twice: Dedup Patterns
Ever watched an email agent reply to the same message twice? The recipient gets two near-identical responses seconds apart, screenshots them, and your…
What a Mailman service shutdown reveals about the state of mailing lists in 2026
DreamHost is shutting down their hosted Mailman service on July 31. If you run a list there, you already know. If you don't, it's worth understanding …
Testing Email Workflows Without Email Server — With Playwright & Mokapi
Email is one of those things that's genuinely hard to test. It goes out through an SMTP server, lands in a real inbox, and you have no programmatic wa…
SPF, DKIM, and DMARC Explained: The Complete Email Authentication Guide
Every day, over 3 billion phishing emails are sent worldwide. Many of them claim to be from legitimate organizations: your bank, your employer, your S…
Transactional Email in Medusa v2 Without the Notification Module
Medusa v2 has a notification module. It's designed exactly for transactional email — you register a provider, configure templates, and the module fire…
How to Test Your SPF Record for Common Mistakes (Step by Step)
Your SPF record looks correct. You added the include values your email provider told you to add. You saved the record. Emails are still landing in spa…
SOC2 CC6.6 Made Easy: Automating Logical Access Evidence
Your SOC2 audit window opens in three months. Your DMARC policy is p=none . Your auditor is going to flag it. Not because p=none is wrong as a startin…
The Blacklist Nightmare: How to Get Off Spam Lists Fast
Revenue dropped overnight. Your transactional emails — password resets, invoices, order confirmations — aren't reaching customers. Support tickets sta…
How to check if your domain is on an email blacklist (and what to do if it is)
If your emails are suddenly going to spam or not arriving at all, a blacklist is one of the first things to rule out. Blacklists are databases of IP a…
I corrected my AI email security analysis — 6 companies have real gaps
Yesterday I published an analysis claiming that 26 of 39 AI companies use SPF softfail , implying their email could be spoofed. A reader ( @privacyfis…
Open Source Email Server Setup: The 2026 Infrastructure Guide
The Definitive Guide to Self-Hosted Email Infrastructure in 2026 Why would anyone self-host email in 2026? AWS SES, SendGrid, Mailgun, and Postmark ex…
KumoMTA vs PowerMTA: The 2026 Enterprise Email Infrastructure Comparison
KumoMTA vs PowerMTA: The Definitive Guide to Enterprise Email Delivery in 2026 When your platform sends 10 million transactional emails a day, the dif…
How to Set Up KumoMTA: A Complete Guide for High-Volume Email Senders - Updated 2026 Guide
How to Set Up KumoMTA: A Complete Guide for High-Volume Email Senders KumoMTA's combination of open-source licensing and modern architecture makes it …
Email Authentication Dkim Spf Dmarc - Updated 2026 Guide
Bounce Rate Reduction: The Complete Technical Guide for Email Engineers Bounce rate is the silent killer of email deliverability. A rate above 2% gets…
Bounce Rate Reduction Guide - Updated 2026 Guide
Bounce Rate Reduction: The Complete Technical Guide for Email Engineers Bounce rate is the silent killer of email deliverability. A rate above 2% gets…
IP Warmup for New Mail Servers: Complete 2026 Guide
You just deployed your new KumoMTA or PowerMTA server. You have clean IPs, perfect DNS, and a million emails queued to send. Stop. If you send that vo…
Bounce Rate Reduction: The Complete Technical Guide
Bounce rate is the silent killer of email deliverability. A rate above 2% gets you flagged. Above 5% gets you blocked. Most teams don't know they have…