What is a transactional email?
Updated November 1, 2026
A transactional email is a message your app sends to one person because of something they did, or something that happened to their account. Receipts, password resets and shipping updates are all transactional email.
The person is expecting it, it is about them, and it usually arrives within seconds of the thing that caused it. That is what separates it from marketing email, which goes to many people at once to promote something.
Examples of transactional email
Accounts
- A welcome email after someone signs up
- A link to confirm an email address
- A password reset link or a sign-in code
Orders and billing
- An order confirmation or a receipt
- A shipping or delivery update
- A failed payment notice or a subscription renewal reminder
Activity and alerts
- Someone commented, replied or shared something with you
- A report or export is ready to download
- You are close to a usage limit
Security
- A sign-in from a new device
- Your password or email address was changed
What makes an email transactional
- Something triggers it: a purchase, a sign-up, a password reset request or an event in the account.
- It goes to one person, the one the event is about.
- The details are theirs: their name, their order, their amount. The same email reads differently for every customer.
- They need it. Without the receipt or the reset link, the thing they were doing does not work.
Transactional vs marketing email
| Transactional | Marketing | |
|---|---|---|
| Sent because | Something happened in the account | You decided to promote something |
| Goes to | One person | A list of people |
| Content | That person's details | Mostly the same for everyone |
| Examples | Receipts, password resets, shipping updates | Newsletters, product launches, sales |
| Unsubscribe | Usually not offered, because the person needs it | Expected, and required in many countries |
Consent and unsubscribe rules differ by country, and some emails sit in between, like a receipt that also promotes a sale. Check the rules that apply where your customers are.
Many teams send the two kinds from separate streams or accounts, so that a marketing campaign with a high complaint rate does not slow down password resets.
How apps send transactional email
When the event happens, the app asks an email provider such as SendGrid, Amazon SES, Postmark or Mailgun to deliver a message. The provider handles the delivery: mail servers, reputation, bounces and spam complaints.
The words often live in the app's code. That works until someone wants to fix a typo in a receipt or reword a welcome email, and the change has to wait for a developer and a release.
A template layer moves the words out of the code. The app sends one request with the template's id and the customer's details, and the template layer fills in the email and hands it to the provider.
Where CommuniQueue fits
CommuniQueue is that template layer. Your team writes, tests and publishes the emails in a shared editor, and CommuniQueue sends them through the provider you already use.
- All of your app's transactional email: receipts, resets, alerts and everything else on this page.
- Small announcements to a list of up to 1,000 people, with one-click unsubscribe headers on marketing-type emails.
- Newsletters and large campaigns belong in a marketing email platform instead.
Your app's emails, written by your team
CommuniQueue holds your templates and sends through the email service you already use. 7-day free trial on every plan, for your first subscription.