What happens when you exceed the limit
Throttling / MaxSendingRateExceeded. Sending services enforce their quotas at the API, so the failure is explicit and immediate. The reputation of the domain you send from is a separate matter that the quota does not protect.
How the limit interacts with a warmup ramp
Dedicated IPs use SES automatic IP warm-up — a different product from mailbox warming. A warmup ramp and a provider cap are two different ceilings. The cap is where Amazon SES stops you; the ramp is where reputation would stop you first. MailStrike's default ramp climbs to 30 warming emails a day per mailbox over 21 days, and real outreach starts at 20 to 30 a day once the ramp is done. Set the provider, the domain's age and the target volume below to see the schedule.
| Outreach a day, per mailbox | 1 mailbox | 2 mailboxes | 3 or more |
|---|---|---|---|
| Not sending yet | 30 | 21 | 18 |
| 10 emails | 30 | 21 | 18 |
| 20 emails | 25 | 18 | 15 |
| 30 emails | 20 | 14 | 12 |
| 40 emails | 15 | 11 | 9 |
| 50 emails | 10 | 7 | 6 |
The rule behind the table: a mailbox on its own that is not sending yet warms at the plan default of 30 a day, and once outreach starts it drops one warming email for every two you send, down to a floor of 10. Put a second mailbox on the domain and each one needs 70% of that figure, three or more and each needs 60%, because the domain earns the signal across all of them. Volume is a setting per mailbox, so you can dial these in directly.
Trial, free tier and new-account restrictions
sandbox can only send to verified identities. Free and trial tiers exist to test integration, not to run campaigns; the volume above them is a plan decision.
The bulk sender rules are a separate limit
None of the caps above is the line that decides placement. Google's and Yahoo's bulk-sender requirements and Microsoft's 2025 high-volume rules set authentication, spam-rate and unsubscribe conditions that apply well below any sending cap; the sender requirements page has them provider by provider, and the auth checker tests a domain against them.
How Amazon SES compares
documented cap per day (log scale); basis differs per provider
- SendGrid sending limits
- Mailgun sending limits
- Postmark sending limits
- Brevo sending limits
- Google Workspace sending limits
- Gmail sending limits
Questions about Amazon SES sending limits
What is the Amazon SES sending limit per day?
Sandbox: 200 per 24h at 1/sec; production: per-account quota assigned on request. Recipients per day: quota-based. Source: Amazon SES's own documentation, checked 6 Sep 2026.
What happens when you exceed the Amazon SES sending limit?
Throttling / MaxSendingRateExceeded. Above the plan's allowance, sending resumes when the quota or plan allows.
How many recipients per message does Amazon SES allow?
50.
How do I increase the Amazon SES sending limit?
sandbox can only send to verified identities. Volume above that is plan-based: Sandbox: 200 per 24h at 1/sec; production: per-account quota assigned on request.
Is there a Amazon SES rate limit per minute or per hour?
sandbox 1 email/second.
Does the Amazon SES limit change how you warm up?
Dedicated IPs use SES automatic IP warm-up — a different product from mailbox warming.