Types
SMTP
Check SMTP server connectivity and response to ensure email pathway availability.
SMTP monitors validate accessibility of an SMTP server. They attempt to open a connection (and may perform a basic protocol handshake) to ensure mail infrastructure is reachable.
Use Cases
- Transactional email relays
- MX ingress servers
Settings Tabs
| Tab | Purpose |
|---|---|
| Basic Settings | Hostname, port, security mode (STARTTLS/SSL), authentication toggle |
| Advanced Settings | Timeouts, optional credentials, EHLO / banner expectations |
Status Labels
- Reachable (good)
- Unreachable (bad)
Tips
- Monitor both primary and fallback relay hosts.
- Use a higher TTL (e.g. 120s+) to reduce unnecessary auth cycles if authentication is enabled.