Compliance & System Limits

Last updated: February 3, 2026

Default Sending Limits (Per Account)

All new accounts start with conservative limits to ensure deliverability and prevent abuse. These limits are enforced automatically by our system.

Exact Default Limits:

Limit Type	Default Value
Daily Sending Cap	100 emails per day
Per-Campaign Limit	100 recipients maximum
Per-Hour Throttling	10 emails per hour
Weekly Limit	500 emails per week
Monthly Limit (Initial)	2,000 emails per month
Concurrent Campaigns	1 active campaign at a time

Note: These are starting limits. Limits increase gradually through our warm-up plan as accounts demonstrate clean metrics and compliance. Limits are enforced per tenant/account and cannot be exceeded.

Warm-Up Plan & Limit Increases

Limits increase gradually based on account performance:

Warm-Up Schedule:

Weeks 1-2: 100 emails/day (default)
Weeks 3-4: If bounce rate < 2% and complaint rate < 0.05%: Increase to 250 emails/day
Month 2: If metrics remain clean: Increase to 500 emails/day
Month 3: If metrics remain clean: Increase to 1,000 emails/day
Month 4+: Gradual increases up to 10,000 emails/day based on account history

Requirements for Limit Increases:

Hard bounce rate must stay below 2%
Complaint rate must stay below 0.05% (0.5 complaints per 1,000 emails)
No policy violations
No sudden spikes in sending volume
Consistent sending patterns (not sporadic)

Auto-Pausing Rules & Thresholds

Our system automatically monitors all accounts and pauses sending when thresholds are exceeded. This protects deliverability and ensures compliance.

Bounce Rate Thresholds:

Hard Bounce Rate: Auto-pause if exceeds 5% in a rolling 7-day window
Total Bounce Rate: Auto-pause if exceeds 10% in a rolling 7-day window
Hard Bounce Spike: Auto-pause if more than 10 hard bounces occur within 1 hour
Action: Sending paused immediately, account flagged for review

Complaint Rate Thresholds:

Complaint Rate: Auto-pause if exceeds 0.1% (1 complaint per 1,000 emails sent)
Multiple Complaints: Auto-pause if 3+ complaints received within 24 hours
Action: Sending paused immediately, account flagged for review

Unsubscribe Rate Thresholds:

Unsubscribe Rate: Alert if exceeds 2% (investigation required, may result in pause)
Action: Account flagged for review, may be paused if pattern indicates issues

Volume Spike Protection:

Sudden Increase: Auto-pause if sending volume increases by more than 200% compared to previous 7-day average
Action: Sending paused, manual review required before resuming

Rolling Windows: All thresholds are calculated using rolling windows (typically 7 days) to ensure accurate monitoring and prevent temporary spikes from causing false positives.

Alert System

When thresholds are approached or exceeded, alerts are sent via:

Email Alerts: Sent to account owner when thresholds are at 80% of limit
Critical Alerts: Immediate email notification when auto-pause is triggered
Dashboard Warnings: Visual warnings in account dashboard
Slack Integration: (Optional) Alerts can be sent to Slack channels for team accounts

Account Recovery After Auto-Pause

When an account is auto-paused, the following steps are required:

Account owner receives immediate email notification with details of the violation
Account owner must review and address the underlying issue (e.g., clean email list, fix bounce issues)
Account owner contacts support to request review and reactivation
Our team reviews the account, metrics, and remediation steps
If approved, account is reactivated, often with reduced limits initially
Account may be placed back on warm-up plan if metrics were significantly impacted

Audit Logging

All account activities are logged for compliance and audit purposes:

Account approvals and who approved them
Limit changes and who authorized them
Auto-pause events and reasons
Policy violations and enforcement actions
Support interactions and account modifications

Audit logs are retained for a minimum of 2 years and are available for review by account owners and our compliance team.

Manual Approval Requirements

Before any account can send emails, manual approval is required. The approval checklist includes:

Website review (legitimate business verification)
Use case evaluation (appropriate email marketing practices)
Sender identity verification (business registration, domain ownership)
List source confirmation (documentation of legitimate opt-in methods)
Domain authentication verification (SPF/DKIM records confirmed)
Compliance acknowledgment (Terms of Service and Acceptable Use Policy accepted)

Accounts remain in "Pending" state until all requirements are met and approval is granted. Campaigns cannot be sent until approval is complete.

Questions?

For questions about compliance, limits, or auto-pausing rules, please contact our support team at info@sukimail.com.