Koltrix
Startups
Two-Sided Marketplace Emails: Buyers, Sellers and Disputes
Marketplaces email two audiences about the same events. How to map messages for buyers and sellers, relay conversations, handle disputes and route replies.
5 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
ProductHow we send ReminderIt's email
ReminderIt is our other product. Every reminder, receipt and support reply it sends goes through Koltrix. Here is the whole setup, including the awkward parts.
2 min read
- Customer support
E-Commerce Order Emails: Handling the Replies Customers Send
Customers reply to order and shipping emails with real questions. How to route those replies, handle the common ones fast, and prepare for peak season.
4 min read
StartupsInvoice and Receipt Emails: Small Details That Cut Billing Tickets
Most billing tickets start with a confusing invoice email. The fields to include, who should receive it, and why the reply address matters more than design.
4 min read
ProductCustomer Loop: Where Replies to Your Receipts Should Go
Customers reply to receipts and password resets all the time. Customer Loop threads those replies into your team inbox under the message that caused them.
5 min read
GuidesChoosing a Transactional Email API: 12 Questions to Ask
Every transactional email API sends mail. The differences hide in webhooks, suppression, logs, replies and exit. Twelve questions to ask before you commit.
5 min read
GuidesSwitching Transactional Email Providers With Zero Downtime
Moving your app's email to a new provider doesn't need a risky big-bang cut-over. Dual DKIM, a thin sending interface, gradual rollout and suppression export.
4 min read
StartupsTransactional, Lifecycle or Marketing? Classifying SaaS Emails
Every SaaS email falls into one of three buckets, and the bucket decides consent, unsubscribe links and how it's sent. Practical definitions and the gray areas.
4 min read
- Comparisons
Resend, Postmark and SendGrid: Choosing a Transactional API
Three of the most common answers to how should our app send email, compared fairly: who each one suits, where each is strongest, and the questions to ask first.
5 min read