> ## Documentation Index
> Fetch the complete documentation index at: https://developer.lemlist.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Warmup Error

A mailbox lemwarm keeps out of warmup. `title`, `whatHappened` and `whatToCheck` explain the cause in plain words; `action` names the fix available in the app; `code` is the value shown in the lemlist notification, the one support asks for.


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.