Custom Alert Rules
Build custom alert rules to monitor what matters most to you. Configure metrics, thresholds, and notification channels for precise alerting.
Rule Builder
Each alert rule consists of three parts:
Metric
What to monitor (pass rate, failures, volume, etc.)
Condition
When to trigger (threshold, comparison, change)
Action
What to do (notify, group, snooze options)
Example Rule
Available Metrics
Pass Rate Drop
Alert when authentication pass rate falls below threshold
Failure Spike
Alert when failures exceed normal levels
New Sender Detected
Alert when a new IP starts sending as your domain
Policy Violation
Alert when emails are rejected or quarantined
DNS Change
Alert when SPF, DKIM, or DMARC records change
Volume Anomaly
Alert when email volume is unusually high or low
Comparison Operators
| Operator | Symbol | Example |
|---|---|---|
| Less than | < | Pass rate < 90% |
| Greater than | > | Failures > 100 |
| Equals | = | Policy = reject |
| Changes | ≠ | DNS record changes |
| Contains | ∈ | Sender contains 'unknown' |
Notification Channels
Send alerts to email addresses
Slack
Post to Slack channels
Discord
Post to Discord channels
Microsoft Teams
Post to Teams channels
Telegram
Send Telegram messages
Custom Webhook
POST to any URL
Managing Alerts
Snooze
Temporarily disable alerts for maintenance windows
Enable/Disable
Toggle rules on or off without deleting
Delete
Remove rules you no longer need
Alert Grouping
Similar alerts are automatically grouped to reduce noise. You can group by domain, alert type, or severity level.
Plan Limits
| Plan | Custom Rules | Channels |
|---|---|---|
| Free | — | Email only |
| Plus | 3 rules | Email, Slack, Discord, Webhook |
| Professional | 25 rules | All channels |
| Enterprise | Unlimited | All channels + custom |