Hi,
here you have the result of the Diagnostic Test.
Mailer: postsmtp
HostName: vnodeautomation.com
cURL Version: 7.68.0
OpenSSL Version: OpenSSL/1.1.1f
OS: Linux flamboyant-cerf 5.4.0-53-generic #59-Ubuntu SMP Wed Oct 21 09:38:44 UTC 2020 x86_64
PHP: Linux 8.0.30 C
PHP Dependencies: iconv=Yes, spl_autoload=Yes, openssl=Yes, sockets=Yes, allow_url_fopen=Yes, mcrypt=No, zlib_encode=Yes
WordPress: 6.5.4 en_US UTF-8
WordPress Theme: N3-vNode
WordPress Plugins: TablePress, WPML Multilingual CMS, Advanced Custom Fields PRO, Solid Security Basic, Classic Editor, Complianz | GDPR/CCPA Cookie Consent, Contact Form 7 Multilingual, Contact Form 7, Country & Phone Field Contact Form 7, Duplicate Page, Elementor Pro, Elementor, Flamingo, Freshchat, LiteSpeed Cache, MainWP Child Reports, MainWP Child, Post SMTP, The Plus Addons for Elementor, The Plus Addons for Elementor – Pro, UpdraftPlus – Backup/Restore, WordPress Importer, WP Activity Log, Redirection for Contact Form 7, WPML String Translation
WordPress wp_mail Owner: /var/www/vhosts/vnodeautomation.com/httpdocs/wp-content/plugins/post-smtp/Postman/PostmanWpMailBinder.php
WordPress wp_mail Filter(s): wp_staticize_emoji_for_email, PostsmtpMailer->get_mail_args
WordPress phpmailer_init Action(s): wpcf7_phpmailer_init
Postman: 2.9.4
Postman Sender Domain (Envelope|Message): vesterbusiness.com | vesterbusiness.com
Postman Prevent Message Sender Override (Email|Name): Yes | Yes
Postman Active Transport: Gmail API (https:login://www.googleapis.com:443)
Postman Active Transport Status (Ready|Connected): Yes | Yes
Postman Deliveries (Success|Fail): 68 | 0
Regards