What’s the difference between local and remote bounce sources?
- Local vs remote bounce sources indicate different problems:
- Local bounce sources:
- Your sending server. Your MTA queue. Your relay infrastructure. Before external transmission.
- Local causes:
- Configuration errors. DNS lookup failures from your end. Queue expiration. Internal policy rejections.
- Remote bounce sources:
- Recipient's MX server. Intermediate relays. Gateway security services. After leaving your network.
- Remote causes:
- User does not exist. Mailbox full. Reputation rejection. Content filtering.
- Diagnostic difference:
- Local: You can fix it. Remote: Depends on external factors. Identifying source determines response.
- Local bounces are your ship's problems. Remote bounces are the destination's decisions.
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