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

# Messaging

<Snippet file="graphql/sdk-note.mdx" />

We provide various methods to message your customers with the Plain API. You can use this to reach out proactively, build an autoresponder or even to handle things like waiting list access.

<CardGroup cols={2}>
  <Card title="Send emails" icon="paper-plane-top" href="/graphql/messaging/send-email">
    Send a new email in a thread ignoring previous communications.
  </Card>

  <Card title="Reply to emails" icon="paper-plane-top" href="/graphql/messaging/reply-email">
    Use this to reply to an existing inbound email in a thread.
  </Card>

  <Card title="Reply to thread" icon="reply" href="/graphql/messaging/reply-email">
    Reply to a thread automatically using the best channel.
  </Card>
</CardGroup>