Send each new customer a short welcome series that stops when they reply
Published 2026-10-30
When a new customer signs up, buys, or books for the first time, a few well timed emails do a lot of work. A thank you on day one, a short how to on day three, and a check in after a week answer the common questions before they are asked. Most small teams mean to send these and then get busy. Email marketing tools can do it, but they are built for newsletters, charge by list size, and keep sending even after the person has already replied with a question. ChatGPT or Claude can write all three emails in a minute. The chat cannot send them on the right day, keep track of who got which one, or notice that someone answered.
What a chat cannot do alone
A welcome series is a small piece of memory plus a clock. Something has to record when each person started, check every day who is due for the next email, send it from your address, and log that it went out. It also has to read replies, because a person who wrote back with a real question should hear from you, not from step two of a series. A chat only acts while you are typing in it, and it forgets the list when the thread ends.
What your assistant builds with Sails
Sails is a coding agent you connect over MCP, with cloud deployment built in. Your assistant writes the code and Sails runs it in the cloud. For a welcome series it builds a few small pieces.
A table of customers with their name, email, start date, the last step sent, and a status of active, replied, or done. A second table holds the steps themselves, each with a day number, a subject, and a body, so you can edit the wording without touching code.
A small form or API that adds a new customer to the table, so your checkout, booking page, or signup form can enroll people on its own.
A mailbox on your domain that sends each email and receives the replies. When a reply arrives, a hook marks that customer as replied, stops the series, and forwards the message to you.
A scheduled job written as ordinary shell code with no model in the loop. Every weekday morning it finds each active customer whose next step is due, sends it, and records the step.
Why it works
Every customer gets the same good first week, and nobody gets a canned email after they have already asked for help. The list and the wording live in your own tables, so changing day three is one edit. In a later chat your assistant can read the log and tell you which step gets the most replies.
Hand it off
Copy this into your assistant:
Add Sails from https://sails.app/start. Build a welcome email series for new customers. Keep a table of customers with name, email, start date, last step sent, and status, and a table of steps with a day number, subject, and body that I can edit. Give me a form and a small API that add a customer. Send the emails from a mailbox on my domain, and when someone replies, stop their series and forward the reply to me. Write a weekday morning scheduled job in plain shell code with no model involved that sends each due step and logs it. Ask me anything you need before you start.