diff --git a/wp-includes/pluggable.php b/wp-includes/pluggable.php
index 2ec21126e0..5ab3eef749 100644
--- a/wp-includes/pluggable.php
+++ b/wp-includes/pluggable.php
@@ -307,7 +307,7 @@ if ( ! function_exists( 'wp_mail' ) ) :
 							if ( false !== $bracket_pos ) {
 								// Text before the bracketed email is the "From" name.
 								if ( $bracket_pos > 0 ) {
-									$from_name = substr( $content, 0, $bracket_pos - 1 );
+									$from_name = substr( $content, 0, $bracket_pos );
 									$from_name = str_replace( '"', '', $from_name );
 									$from_name = trim( $from_name );
 								}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index e65411e4c3..c4e7f9cd18 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.1-alpha-53899';
+$wp_version = '6.1-alpha-53900';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.