[ message not correct ]

hi there, i am using postman but i am not able to send any forms.
‘the message is not correct’ it says. how can i fix this?

here the results for the diagnostic test :
==
OS: FreeBSD webhosting48.transip.nl 10.1-TRANSBSD-p11 FreeBSD 10.1-TRANSBSD-p11 #0: Fri Jul 10 09:18:44 UTC 2015 [email protected]:/usr/obj/usr/src/sys/TRANSBSD amd64
HTTP User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/601.2.7 (KHTML, like Gecko) Version/9.0.1 Safari/601.2.7
PHP: FreeBSD 5.4.41 C
PHP Dependencies: iconv=Yes, spl_autoload=Yes, openssl=Yes, sockets=Yes, allow_url_fopen=Yes, mcrypt=Yes
WordPress: 4.3.2 nl_NL
WordPress Theme: Sanabel Child
WordPress Plugins: LayerSlider WP, All-in-One WP Migration, BAW Multipass for Protected Pages, Contact Form 7, Disable Comments, Easy Theme and Plugin Upgrades, Enhanced Media Library, Font Awesome Icons, Force Images Download, GA Google Analytics, WPBakery Visual Composer, MailChimp for WordPress Lite, Private Blog, Postman SMTP, Revolution Slider, Sanabel Core, TJ Custom CSS, Widget Shortcode, WordPress Move, Yoast SEO, CF Post Formats, WP Super Cache
WordPress wp_mail Filter(s): wp_staticize_emoji_for_email
Postman: 1.6.24
Postman Sender Domain (Envelope|Message): hollandsch-welvaren.nl | hollandsch-welvaren.nl
Postman Prevent Message Sender Override (Email|Name): No | No
Postman Transport URI: smtp:tls:plain://smtp.gmail.com:587
Postman Transport Status (Configured|Ready|Connected): Yes | Yes | Yes
Postman Deliveries (Success|Fail): 38 | 14
Postman TCP Timeout (Connection|Read): 20 | 60
==

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