+
+ // Try authentication by a plugin
+ //
+ // NOTE: there is another hook in functions/auth.php called "smtp_auth"
+ // that allows a plugin to specify a different set of login credentials
+ // (so is slightly mis-named, but is too old to change), so be careful
+ // that you do not confuse your hook names.
+ //
+ $smtp_auth_args = array(
+ 'auth_mech' => $smtp_auth_mech,
+ 'user' => $user,
+ 'pass' => $pass,
+ 'host' => $host,
+ 'port' => $port,
+ 'stream' => $stream,
+ );
+ if (boolean_hook_function('smtp_authenticate', $smtp_auth_args, 1)) {
+ // authentication succeeded
+ } else if (( $smtp_auth_mech == 'cram-md5') or ( $smtp_auth_mech == 'digest-md5' )) {