domailo
Sign inStart trial

Payment reminder emails with AI: scheduled due-date reminders

Quick answer: Give the assistant the list of who has a bill coming due (pasted into the chat or in a CSV spreadsheet that arrived by email) and ask for polite reminders from billing@. It uses enviar_email with agendar_para, and each reminder sits in the Scheduled folder until send time; cancelar_agendamento turns any of them back into a draft.

  • Read and write
  • Checked on October 17, 2026

Who it is for

For whoever runs the finances of a small business and sends the same kind of notice every month: invoice due, membership overdue, bill sent. The text is nearly identical; only the name, amount and date change.

The assistant writes each reminder with the right details and schedules it for the morning you choose. Domailo does not know who owes what: that comes from you, from a spreadsheet attached to an email or from another tool connected to the assistant.

What it looks like

domailoconnected via MCPExample with fictional data

Request: Use the invoices-october.csv spreadsheet the accountant sent yesterday and schedule, for tomorrow at 8 am Eastern Time, a polite reminder for each customer with an invoice due this week, sent from billing@example.com.

  • listar_emailscaixa: "billing@example.com" · busca: "invoices"1 conversation
  • ler_email1 message · 1 attachmentread
  • ler_anexoinvoices-october.csv4 customers this week
  • enviar_email4 sends · agendar_para: tomorrow 08:00 (-04:00)scheduled

Four reminders scheduled for tomorrow at 08:00, sent from billing@. They are in the Scheduled folder, and any of them can be canceled until then:

  • Padaria Pão de Mel$450.00 · due in 3 days
  • Oficina Rota 9$1,200.00 · due in 3 days
  • Estúdio Lume$380.00 · due in 4 days
  • Clínica Vida$2,150.00 · due in 5 days

Step by step

  1. Connect Domailo with "Read and write" access, with access to the mailbox the reminders should come from (billing@ or accounts@).
  2. Provide the data: paste the list into the chat or point to the email with the CSV spreadsheet. The assistant opens the attachment with ler_anexo.
  3. Ask for one sample reminder first and adjust the tone: friendly, with amount, due date and how to pay. Only then ask it to schedule them all.
  4. Ask for the schedule with date, time and time zone ("tomorrow at 8 am Eastern Time"). The assistant uses enviar_email with agendar_para, one send per customer.
  5. Check the Scheduled folder in the webmail. To drop a customer from the list, ask to cancel the schedule: the message goes back to drafts and is not sent.

Ready-to-copy prompts

Swap the addresses and names for yours. The more specific the request (mailbox, time period, what the reply must say), the better the result.

  • Write a polite due-date reminder for Padaria Pão de Mel: $450.00, due on the 20th, payable by card or bank transfer. Show it here before scheduling.
  • Schedule the reminders on this list for Monday at 9 am Eastern Time, one per customer, sent from billing@example.com. Use one idempotency key per customer.
  • List the scheduled sends in billing@example.com and the time of each.
  • Cancel the reminder scheduled for Oficina Rota 9: the payment came in.
  • For anyone who did not reply to last week's reminder, draft a second notice, more direct and still friendly. Don't send it.

How it changes by type of business

Accounting firm
At the start of the month, reminders to clients who have not sent statements and receipts yet, with the list of missing documents for each one.
School, course or gym
A tuition or membership notice a few days before the due date, same text with each student's or parent's name.
Service provider
After delivery, an email with a summary of the work and the invoice; the PDF invoice is attached in the webmail, because MCP does not send files.

Permissions needed

  • "Read and write" access. Tools used: listar_emails, ler_email, ler_anexo, enviar_email, cancelar_agendamento.
  • Admins, and people an admin allowed to use AI assistants. Each person sees only the mailboxes they already open in the webmail.
  • Included in the Startup, Essential and Team plans and during the trial.

Caveats and limits

  • Domailo has no accounts receivable records: who owes, how much and when come from you, a spreadsheet or another tool connected to the assistant.
  • Through MCP you cannot attach the invoice. Put the payment link in the text, or save a draft and attach the PDF in the webmail.
  • Each reminder goes to one recipient, with no CC/BCC. Scheduling accepts anywhere from 30 seconds to one year ahead.
  • At send time, Domailo checks the plan, your access to the mailbox and the domain again. If anything fails, the message is marked as failed and nothing is sent.
  • Each person can make up to 60 sends every 15 minutes through MCP; bigger lists need to be split.
  • Contact only the person who owes, without threats or public exposure. Consumer laws in many countries forbid harassment in collections; in Brazil, article 42 of the Consumer Protection Code.

Frequently asked questions

Do the reminders go out on their own every month?

No. Domailo has no recurring billing: each round starts with a request from you to the assistant. What is automatic is the send at the scheduled time, once you asked for it.

Can I cancel a reminder that is already scheduled?

Yes, as long as it has not started sending. cancelar_agendamento turns the message back into a draft for whoever wrote it. In the webmail, the Scheduled folder has the same button.

Does the reminder go out with the company signature?

Yes. The mailbox signature (billing@, for example) is added to every send, scheduled ones included. The assistant does not need to repeat it in the text.

How do I stop the assistant from sending the same reminder twice?

enviar_email accepts an idempotency key: repeating the call with the same key returns the previous send instead of sending again. Ask for one key per customer, as in the example.