FAQ
- Why Are All Sources Suspended (No Sources Are Eligible For Selection)?
- Can I Migrate From Momentum (Ecelerity) to KumoMTA?
- Can I Migrate From PowerMTA to KumoMTA?
- Why Aren't My Configuration Changes Taking Effect?
- How Do I Attach Custom Metadata (Tenant / Campaign) to a Message?
- How Do I Reclassify a Bounce (Make a 5xx Transient Instead of Permanent)?
- Does KumoMTA Follow Secure Development Lifecycle (SDLC) Practices?
- Why Is My Mail Sending From the Wrong IP? (egress_pool 'unspecified')
- How do I flush a queue?
- Why Is KumoMTA Using So Much Memory?
- How Can I Get Help With KumoMTA?
- How Can I Tell What Traffic Shaping Rules Apply To A Domain?
- How do I skip IPv6 MX hosts for outbound SMTP?
- How do I create an always-suspended queue?
- How do I include multiple configuration files from a directory?
- Is There a SaaS Version of KumoMTA?
- How Do I Monitor KumoMTA with Prometheus and Grafana?
- How Can I Apply Multiple DKIM Signatures to a Message?
- Why is KumoMTA Accepting Connections From Systems Not Listed in relay_hosts?
- How Do I Handle TLS Handshake or Certificate Failures to a Destination?
- How Do I Permanently Stop or Drop Queued Mail?
- How do I resolve a
Permission Deniederror? - How Do I Configure POP3/IMAP?
- How Do I Set Per-Tenant or Per-IP Send Rate Limits (Hourly and Daily)?
- What Do ReadyQueueWasFull and DueTimeWasReached Mean?
- How Do I Receive Inbound Mail and Process OOB Bounces and FBLs?
- How Do I Relay Mail Through a Smarthost or Another SMTP Server?
- How Do I Remove or Hide the Received / KumoMTA / X-KumoRef Headers?
- How Do Shared Throttles Work for Small Connection Limits in a Cluster?
- How Do I Ship Logs to Splunk, Kafka, or Another System?
- Why Does Restart or Shutdown Take Several Minutes (or Hang)?
- How Do I Set Up SMTP AUTH for Injection?
- How Do I Avoid Having a Single Point of Failure?
- How Can I Test TLS Injection?
- What is KumoMTA?
- Who is KumoMTA For?