MigoSMTP enforces three tiers of sending limits to protect deliverability, prevent abuse, and ensure fair resource usage across all accounts. Understanding how these limits work — and how to work within them — is essential for uninterrupted email delivery in your application.
The Three Limit Tiers
| Limit Type | What It Controls | When It Resets | What Happens When Reached |
|---|---|---|---|
| Monthly Quota | Total emails dispatched within one billing period | On your plan renewal date each month | All sending is blocked until renewal or plan upgrade |
| Daily Limit | Emails dispatched within a single calendar day | Midnight in your configured timezone | Messages are queued — not dropped — and sent when limit resets |
| Hourly Limit | Emails dispatched within a 60-minute window | Top of each hour in your configured timezone | Messages are queued — not dropped — and sent when limit resets |
Queued, not dropped: When a daily or hourly limit is reached, MigoSMTP queues the messages rather than rejecting them. They are delivered automatically as soon as the limit window resets. However, monthly quota exhaustion causes a hard block — no queuing occurs after the monthly limit is hit.
Limits by Plan
| Limit | 10k Plan | 20k Plan | 30k Plan |
|---|---|---|---|
| Monthly quota | 10,000 emails | 20,000 emails | 30,000 emails |
| Daily limit | 500 emails/day | 1,000 emails/day | 1,500 emails/day |
| Hourly limit | 50 emails/hour | 100 emails/hour | 150 emails/hour |
How Limits Are Counted
- Per-workspace counting: Limits apply to your entire MigoSMTP workspace — they are shared across all SMTP accounts and all sending methods (SMTP relay and Email API).
- What counts as one email: Each recipient address counts as one email regardless of CC or BCC usage. Sending to 100 recipients in a single API call counts as 100 emails against your quota.
- Failed and bounced emails: An email that bounces or is rejected by the receiving server still counts toward your sending quota — it was dispatched from your account.
- Test emails: Test emails sent via the SMTP Accounts test feature also count toward your quota.
How to Check Your Current Usage
Via the Dashboard
- Log in to MigoSMTP.
- The Plan Details panel on the right side of the dashboard shows: Emails sent: X / 30,000
- The top header banner shows today's sent count and delivery rate.
- The 7-Day Volume chart shows your daily dispatch volumes over the last week.
Via the API
GET https://api.migosmtp.com/v1/account/usage
Authorization: Bearer YOUR_API_KEY
Response:
{
"monthly_quota": 30000,
"monthly_used": 18450,
"monthly_remaining": 11550,
"daily_limit": 1500,
"daily_used": 342,
"daily_remaining": 1158,
"hourly_limit": 150,
"hourly_used": 23,
"hourly_remaining": 127,
"reset_date": "2026-07-01T00:00:00Z"
}
Setting Up Usage Alerts
Avoid hitting the monthly quota unexpectedly by setting up threshold alerts:
- In MigoSMTP, go to My Alerts in the left sidebar.
- Click Add Alert.
- Select Monthly Quota Usage as the metric.
- Set a threshold — e.g. 80% (sends an alert when 24,000 of 30,000 emails have been used).
- Enter the email address to notify.
- Click Save Alert.
This gives you time to upgrade your plan before hitting the limit and causing sending interruptions.
What to Do When You Hit the Monthly Quota
| Option | How | Effect |
|---|---|---|
| Upgrade your plan | Rackwave Portal → Services → Upgrade Plan | Immediately unlocks higher quota; prorated charge applies |
| Wait for next billing period | No action needed | Quota resets to 0 on your renewal date; sending resumes automatically |
| Top up with wallet credit | Dashboard → Balance → Top Up | Allows additional sending beyond your plan quota at pay-as-you-go rates |
Warming Up — Why Limits Increase Gradually for New Accounts
New MigoSMTP accounts on shared IPs may have lower effective sending rates during the first few weeks as the IP warms up. This is by design — sending large volumes immediately from a cold IP damages deliverability. If you need higher volumes immediately:
- Start with transactional email to engaged recipients — do not begin with a cold bulk campaign.
- Follow the IP Warmup guide to build reputation progressively.
- Contact support if you need to accelerate warmup for a time-sensitive launch.