Regal Send queueing, rate limits and failover

Updated September 22, 2026

Regal Send queueing, rate limits and failover help you control temporary delivery pressure while keeping each transport explicit and testable.

Regal Send queueing, rate limits and failover#

Queueing and rate limits are managed in Regal Send > Settings. Fallback mailers are configured in Regal Send > Integrations, alongside the provider connection they use.

Rate limits and queueing#

Set a per-minute limit to cap new delivery attempts. Use 0 for no plugin-level limit. When the limit is reached, Regal Send can securely schedule a retry only when all of the following are enabled:

  • Full Logging, so the exact email and any retained attachments are available to the scheduled retry.
  • Automatic retries.
  • A retry pause of at least one minute.
  • Queue rate-limited email.

WordPress cron runs delayed retries, so sites with low traffic should use a reliable server cron trigger for time-sensitive email.

Configure a failover mailer#

Regal Send supports one connection for each provider integration. It does not support multiple Microsoft, Google or SMTP accounts under the same provider. A failover must therefore be a separately configured provider, for example Microsoft 365 to Elastic Email or another SMTP provider.

  1. Configure and test the primary mailer.
  2. Open Regal Send > Integrations and expand Choose a mailer, then switch on Need a fallback mailer? below the mailer choices. The fallback card is hidden until this is switched on.
  3. In the Fallback mailer card, choose a different provider and select Configure fallback.
  4. Complete that provider setup. The primary mailer remains unchanged while you do this.
  5. Select Enable this fallback mailer and save integrations.

Regal Send tries the fallback only after a retryable primary transport failure. It will not enable an unconfigured or identical mailer. Test both transports before relying on failover for order or account emails.

Troubleshooting#

If queueing cannot be saved, check the Full Logging mode and retry pause. If failover cannot be saved, return to Integrations and configure a different provider from the Fallback mailer card. Review Email Logs for the primary and fallback outcomes before changing provider credentials.

See WordPress Cron for server cron guidance.

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