axew3 on "Win OS Apache server: no email sent on WP 4.6"

On a test localhost, where apache 2.4 and php 5.6.. are installed, I've think in first, were an error on plugins installed on wp as test, maybe something on wp_w3all plugin. Disabled all plugins, nothing. Reinstalled a new 4.6 ... nothing, no email is send out, also if php mail log file report correctly this:

[26-Aug-2016 22:10:19 UTC] mail() on [F:HTDOCSROOT_INTEGRATIONSwordpresswp-includesclass-phpmailer.php:677]: To: me@w3it.org -- Headers: Date: Fri, 26 Aug 2016 22:10:19 +0000 From: axew <wordpress@localhost> Reply-To: ""me@axew3.com"" <me@axew3.com> Message-ID: <8fce4f82facb168edc150c6d59f4af00@localhost> X-Mailer: PHPMailer 5.2.14 (https://github.com/PHPMailer/PHPMailer) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit
[26-Aug-2016 22:11:14 UTC] mail() on [F:HTDOCSROOT_INTEGRATIONSwordpresswp-includesclass-phpmailer.php:677]: To: you@mysite.org -- Headers: Date: Fri, 26 Aug 2016 22:11:14 +0000 From: axew <wordpress@localhost> Reply-To: ""me@axew3.com"" <me@axew3.com> Message-ID: <cfa75915dd6435213641910a1dc888c8@localhost> X-Mailer: PHPMailer 5.2.14 (https://github.com/PHPMailer/PHPMailer) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit
[27-Aug-2016 16:20:47 UTC] mail() on [F:HTDOCSwp46wp-includesclass-phpmailer.php:677]: To: me@axew3.com -- Headers: Date: Sat, 27 Aug 2016 16:20:47 +0000 From: WordPress <wordpress@localhost> Message-ID: <24af1200a426f7a25e35e8c69d482f1a@localhost> X-Mailer: PHPMailer 5.2.14 (https://github.com/PHPMailer/PHPMailer) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit

All emails seem to be correctly send out, but nothing will never arrive. On WP 4.6.

Finally i've reinstall WP 4.5 to test out it: on it work well. And the log file retued is the same, without php errors.
Any idea what can be the problem?