Reference

Limits and quotas

Every Emailit limit in one place, from per-second and daily sending limits and automatic increases to plan quotas, message size and dashboard limits.

Updated Oct 1, 2026

Emailit applies limits to protect deliverability for everyone on the platform and to keep the service stable. This page lists every limit you might hit, what happens when you do, and how to get more.

Sending limits

Every new workspace starts with the same sending limits, on every plan:

Limit	Default	Resets
Emails per second	2	Rolling one-second window
Emails per day	5,000	00:00 UTC every day

Shared. The limits are per workspace and shared by the API, SMTP and every API key in the workspace.
API counts recipients. A POST /v2/emails request with 3 addresses across to, cc and bcc counts as 3 emails.
SMTP counts transactions. Each SMTP transaction, starting at MAIL FROM, counts once.

Your current limits are on the Dashboard in the Sending Limits card: Emails per Second, Emails per Day with how many you’ve sent today and how many remain, and Subscribers per Audience.

When you hit a limit

The API returns 429 with Rate limit exceeded or Daily limit exceeded. SMTP rejects MAIL FROM with 452 4.4.5 Messages per second limit exceeded or 452 4.5.3 Daily message limit exceeded. Nothing is sent or charged, so you can retry.

Send responses include these headers:

Header	Meaning
`ratelimit-limit`	Emails allowed per second
`ratelimit-remaining`	Emails left in the current second
`ratelimit-reset`	Seconds until the per-second window resets
`ratelimit-daily-limit`	Emails allowed per day
`ratelimit-daily-remaining`	Emails left today
`ratelimit-daily-reset`	Seconds until 00:00 UTC
`retry-after`	Seconds to wait before retrying, on `429` responses

JSON

{
  "error": "Daily limit exceeded",
  "message": "Daily sending limit of 5000 messages has been reached.",
  "limit": 5000,
  "current": 5000,
  "retry_after": 41200
}

Send from a queue that respects your per-second limit, wait for retry-after before retrying, and spread large batches across the day. See Why do I get 429 Rate limit exceeded? and Rate limits.

Automatic increases on Pro and Business

On Pro and Business, Emailit raises sending limits automatically as you build a healthy sending history. Sending health is checked every hour, and limits go up one step when all of these are true:

At least 7 days have passed since the last increase.
The bounce rate is under 2% in every recent window with at least 100 unique recipients.
No sending domain is paused and the workspace isn’t suspended.

Limit	Steps
Emails per day	500, 1,000, 2,000, 5,000, 10,000, 25,000, 50,000, 100,000, 250,000, 500,000, 1,000,000, then 25% more per step up to 2,000,000
Emails per second	2, 5, 10, 20, 50, 100, 200, 500, 1,000, then 25% more per step up to 2,000

A workspace on the defaults moves to 5 emails per second and 10,000 per day at its first increase. See Sending health.

	Pay as you go	Pro	Business	Custom
Sending limit increases	On request	Automatic, based on sending health	Automatic, based on sending health	By agreement

Request an increase

On any plan, you can ask for higher limits. On the Dashboard, select Request Increase in the Sending Limits card and fill in the requested emails per second (up to 50), emails per day (up to 100,000) and subscribers per audience (up to 1,000,000), plus where your list comes from and why you need more. The team usually reviews requests within 24 hours. See Workspace requests.

For more than the form allows, ask about a Custom plan.

Plan limits

	Pay as you go	Pro	Business	Custom
Sending domains	3 (25 after your first credit purchase)	100	1,000	By agreement
Webhook endpoints	3	10	100	100
Webhook payload filters	—	Up to 25 rules	Up to 25 rules	Up to 25 rules
Subscribers per audience	10,000	50,000	250,000	Unlimited

Sending domains. On Pay as you go, your first credit purchase raises the limit from 3 to 25. An AppSumo license replaces the domain limit with its tier’s.
Members. Unlimited, except on workspaces with an AppSumo license, which allow as many members as the tier number.
Subscribers per audience apply when you add or import subscribers. The Audiences list shows usage, for example 12/10,000.

Going over a plan limit returns 422 with a message such as “Pay as you go includes 3 domain(s).” Existing items keep working if you downgrade. You just can’t add more until you’re under the limit.

Message limits

Limit	Value
Recipients per field (API)	50 each in `to`, `cc` and `bcc`
Recipients per SMTP transaction	No fixed limit
Message size, including attachments	40 MB. The API returns `413` and SMTP replies `552`.
Attachment fetched from a URL	25 MB per file, 30-second download timeout
API request body	50 MB
Idempotency keys	Remembered for 24 hours

Other limits

Feature	Limit
Forward an email	3 per hour per workspace
Compose in the dashboard	3 per minute and 10 per hour per workspace
Campaign test sends	Up to 5 addresses per test, 3 tests per minute
Webhook test events	5 per minute
Webhook payload filter rules	25 per endpoint, Pro and above
Events per webhook request	Up to 100
Contact bulk actions (API)	100 contacts per request
Contact import	2,500 contacts per file (`.csv`, `.xlsx` or `.xls`)
Contact export	10,000 rows
Suppression import	10,000 rows, file under 8 MB
Suppression export	10,000 rows
Email verification list	10,000 addresses, file under 10 MB
Email verification results	Kept for 30 days
DMARC report upload	10 MB per file
Template ZIP import	25 MB, 50 MB uncompressed, up to 80 images of 8 MB each
Automation Wait step	Up to 30 days
Public subscribe endpoint	30 requests per minute
List endpoints	1 to 100 items per page
Events list offset	Up to 2,500. Further pages return `422` `events_offset_too_large`.
OAuth client registration	20 per hour per IP address

How to get more

Sending limits: keep bounce rates low on Pro or Business for automatic increases, or use Request Increase on the Dashboard.
Domains, webhooks and subscribers: upgrade the plan.
Anything else: email support@emailit.com or ask about a Custom plan.