Doc Summary
At ProRedLine, all email services are hosted on secure and continuously monitored servers. If your mail server (for example, Main Server 1) becomes temporarily unavailable, incoming messages are not lost.
Most sending mail systems follow the SMTP retry standard, which ensures that emails are safely queued until the server is back online. When delivery fails, the sender’s mail server will:
- Queue the message instead of discarding it.
- Retry delivery automatically at regular intervals (usually every 15 to 60 minutes).
- Continue retrying for up to 24 to 48 hours, depending on the sender’s configuration.
Such temporary interruptions may occur during scheduled maintenance or rare service incidents, but these periods are typically short and are resolved well within 24 hours, in fact, none have ever approached that duration.
As soon as the ProRedLine mail server becomes reachable again, all queued messages are delivered automatically. Only if downtime exceeds the retry period (typically more than two days) will the sender receive a Delivery Failed or Undeliverable notice.
Conclusion:
Temporary downtime, such as maintenance or short service incidents, does not result in permanent email loss. Incoming messages remain safely queued on the sender’s system and are delivered automatically once service is restored. Extended outages beyond two days are extremely unlikely thanks to ProRedLine’s continuous uptime monitoring and redundancy systems.
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