Request approval to send email, and how limits work

All projects share one sending reputation, so one careless sender could harm everyone's delivery. That is why transactional mail needs a short review before you can send, and why sending is monitored afterwards.

Request access

1. Open Transactional Mail in your project.
2. If your project is not approved you see a request form. Under What will you use Transactional Mail for? describe what you will send, for example order receipts and sign-up codes.
3. Add your Company / Project Website and Contact Email(s).
4. Choose Request Transactional Mail Access.

Most requests are approved quickly. While you wait, the page says Access request pending review, and a send attempt returns a message saying access is pending.

If we need more information

The page may show Additional Information Required with a Reviewer Inquiry, usually asking how recipients opt in, your expected volume, and how you handle bounces and complaints. Answer in Your Response & Clarification and choose Submit Details & Resume Review.

If a request is not approved, the page says so, with the reviewer's note if there is one. You can submit updated details with more information about your use.

Free allowance and limits

• The page shows a Monthly Quota with a free allowance (100 emails a month at the time of writing). When you reach it, sending stops with a message telling you to add a payment card in Billing for pay-as-you-go sending.
• There is a per-minute sending limit. If you exceed it, requests are refused with a message asking you to slow down.
• There is also a high safety ceiling on monthly volume. It is not a billing limit, and you can contact support to raise it.

See Pricing for current rates.

Reputation and quarantine

The page shows two numbers:

• Bounce Rate: the share of emails that could not be delivered. The Quarantine Threshold is shown beside it (above 2.5%).
• Complaint Rate: the share of recipients who marked an email as spam (above 0.08%).

If either goes over its threshold, your project is quarantined and sending stops, with the reason shown. A healthy project shows Deliverability Healthy.

To stay healthy:

• Only email people who expect it, such as customers who just signed up or bought.
• Validate addresses when people type them in.
• Stop emailing addresses that bounce.
• Send from your own verified domain. See Send from your own domain.

Account-level sending review

Your account may also have a sending status that covers all projects. In a new account, mail can be limited to your own team and addresses you have verified until production access is granted. If a send is refused for this reason, the message says so and what to do next.

Good to know

• Approval is per project.
• Receiving mail is never limited.
• If your account is paused for non-payment, sending is refused until the balance is cleared.