Koltrix
Team inbox
Turning recurring emails into reusable reply snippets
A worked example of building a team snippet library: finding recurring questions, writing snippets with placeholders, a personalize-this-line rule, and pruning.
5 min read
DeliverabilityWhy two SPF records are worse than none
Publishing a second SPF TXT record makes every check a permerror. How it happens, how to detect it with dig, and how to merge records safely.
4 min read
GuidesBudgeting for an Email Migration: Time, Tools and Risk
An email migration costs more than the new subscription. A worksheet for the hours, overlap fees, archive storage, tools and risk buffer to plan for up front.
5 min read
AI & emailConnecting an AI assistant to your inbox: a pre-flight checklist
Before you connect Claude, ChatGPT or another AI assistant to your email, run this checklist: account, permissions, sending, revocation, admin rules and logs.
5 min read
GuidesPorts 25, 465, 587 and 2525: which should you use?
Port 25 is for server-to-server relay, 587 and 465 are for submission, and 2525 is a common fallback. What each port expects and why clouds block 25.
4 min read
StartupsData Export and Account Deletion Emails Done Right
Export-ready notices, deletion warnings and final confirmations are the last emails a customer gets from you. How to write them so nothing is lost by surprise.
5 min read
DeliverabilityThe case against noreply@ addresses
A noreply sender discards replies that signal engagement and frustrates customers. Route replies to a real inbox instead and set expectations clearly.
4 min read
- Customer support
Support QA: reviewing email replies without micromanaging
A lightweight support QA process: sample a few threads a week, score them on a short rubric, run calibration sessions, and give feedback that actually helps.
5 min read
ProductWhere Your Koltrix Data Lives
Koltrix runs on its own servers on OVHcloud in Frankfurt. Where your mail, attachments and AI requests go, who else touches them, and what we don't have yet.
5 min read
GuidesHow to plan your inbox for a product launch week
A launch-week email playbook for small teams: snippets and labels to prepare, who covers press, users and partners, daily triage passes, and follow-up after.
5 min read
Email APIProcessing bounce and complaint webhooks end to end
Turn bounce and complaint events into suppressions, user-facing flags and alerts. A worked pipeline from webhook receipt to updated account state.
5 min read
GuidesSmall Nonprofit Email: Donor Receipts, Volunteers and a Tight Budget
How a small nonprofit can set up email that outlasts volunteer turnover, sends donor receipts reliably, keeps announcements separate and fits a small budget.
5 min read