1 files changed, 57 insertions, 0 deletions
diff --git a/lib/public/Mail/Headers/AutoSubmitted.php b/lib/public/Mail/Headers/AutoSubmitted.php
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+++ b/lib/public/Mail/Headers/AutoSubmitted.php
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+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2022 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCP\Mail\Headers;
+
+/**
+ * Keyword values for the Auto-Submitted email header, as per RFC 3834.
+ *
+ * The value "auto-notified" as per RFC 5436 is deliberately omitted as it is
+ * meant of notification of the sieve system.
+ *
+ * @link https://www.iana.org/assignments/auto-submitted-keywords/auto-submitted-keywords.xhtml
+ *
+ * @since 26.0.0
+ */
+final class AutoSubmitted {
+	/**
+	 * Name of the Header as used in the final message later
+	 *
+	 * @var string
+	 * @since 26.0.0
+	 */
+	public const HEADER = 'Auto-Submitted';
+
+	/**
+	 * Indicates that a message was NOT automatically generated, but was
+	 * created by a human (or following human interaction). It is the equivalent
+	 * to the absence of an Auto-Submitted header altogether.
+	 *
+	 * @var string
+	 * @since 26.0.0
+	 */
+	public const VALUE_NO = 'no';
+
+	/**
+	 * Indicates that a message was generated by an automatic process, and is
+	 * not a direct response to another message
+	 *
+	 * @var string
+	 * @since 26.0.0
+	 */
+	public const VALUE_AUTO_GENERATED = 'auto-generated';
+
+	/**
+	 * Indicates that a message was automatically generated as a direct response
+	 * to another message.
+	 *
+	 * @var string
+	 * @since 26.0.0
+	 */
+	public const VALUE_AUTO_REPLIED = 'auto-replied';
+}