Index: src/wp-mail.php
===================================================================
--- src/wp-mail.php	(revision 26097)
+++ src/wp-mail.php	(working copy)
@@ -14,8 +14,12 @@
 if ( ! apply_filters( 'enable_post_by_email_configuration', true ) )
 	wp_die( __( 'This action has been disabled by the administrator.' ) );
 
-/** Allow a plugin to do a complete takeover of Post by Email **/
-do_action('wp-mail.php');
+/**
+ * Fires to allow a plugin to do a complete takeover of Post by Email.
+ *
+ * @since 2.9.0
+ */
+do_action( 'wp-mail.php' );
 
 /** Get the POP3 class with which to access the mailbox. */
 require_once( ABSPATH . WPINC . '/class-pop3.php' );
@@ -176,9 +180,17 @@
 	}
 	$content = trim($content);
 
-	//Give Post-By-Email extending plugins full access to the content
-	//Either the raw content or the content of the last quoted-printable section
-	$content = apply_filters('wp_mail_original_content', $content);
+	/**
+	 * Filter the original content of the email.
+	 *
+	 * Give Post-By-Email extending plugins full access to the content, either
+	 * the raw content, or the content of the last quoted-printable section.
+	 *
+	 * @since 2.8.0
+	 *
+	 * @param string $content The original email content.
+	 */
+	$content = apply_filters( 'wp_mail_original_content', $content );
 
 	if ( false !== stripos($content_transfer_encoding, "quoted-printable") ) {
 		$content = quoted_printable_decode($content);
@@ -194,7 +206,14 @@
 
 	$content = trim($content);
 
-	$post_content = apply_filters('phone_content', $content);
+	/**
+	 * Filter the content of the post submitted by email before saving.
+	 *
+	 * @since 1.2.1
+	 *
+	 * @param string $content The email content.
+	 */
+	$post_content = apply_filters( 'phone_content', $content );
 
 	$post_title = xmlrpc_getposttitle($content);
 
@@ -213,7 +232,14 @@
 	if ( empty( $post_ID ) )
 		continue;
 
-	do_action('publish_phone', $post_ID);
+	/**
+	 * Fires after a post submitted by email is published.
+	 *
+	 * @since 1.2.1
+	 *
+	 * @param int $post_ID The post ID.
+	 */
+	do_action( 'publish_phone', $post_ID );
 
 	echo "\n<p>" . sprintf(__('<strong>Author:</strong> %s'), esc_html($post_author)) . '</p>';
 	echo "\n<p>" . sprintf(__('<strong>Posted title:</strong> %s'), esc_html($post_title)) . '</p>';