Resend mail is not formatted

Hi
If I press resend on an email that has not been delivered I recieve the mail unformatted. This is not optimal.

1. Yes, I can sen test email
2. Connectivity Test – see this link: ellasigrid.se/connectivity-test.jpg
3. Diagnostics Test:

Mailer: postsmtp
HostName: lflarmcentral.se
cURL Version: 7.64.1
OpenSSL Version: OpenSSL/1.1.1a
OS: FreeBSD s276.loopia.se 12.0-RELEASE-p3 FreeBSD 12.0-RELEASE-p3 GENERIC amd64
PHP: FreeBSD 7.3.4 C
PHP Dependencies: iconv=Yes, spl_autoload=Yes, openssl=Yes, sockets=No, allow_url_fopen=Yes, mcrypt=No, zlib_encode=Yes
WordPress: 5.2.1 sv_SE UTF-8
WordPress Theme: LF larmcentral
WordPress Plugins: WP Cost Estimation & Payment Forms Builder, Ivory Search, Broken Link Checker, Cookie Notice, Duplicate Page, Enable Media Replace, WPBakery Page Builder, Klarna Checkout for WooCommerce, Klarna Order Management for WooCommerce, Ninja Forms, PHP Compatibility Checker, Popups – WordPress Popup, Post SMTP, Really Simple SSL, Redirection, Responsive Menu, Search & Filter Pro, Ultimate FAQ, Product Feed PRO for WooCommerce, WooCommerce, Wordfence Security, WordPress Importer, Yoast SEO, WP Store Locator
WordPress wp_mail Owner: /www/webvol30/wd/30dd80kzklnwt0y/lflarmcentral.se/public_html/wp-content/plugins/post-smtp/Postman/PostmanWpMailBinder.php
WordPress wp_mail Filter(s): wp_staticize_emoji_for_email
WordPress wp_mail_from Filter(s): wordfence::fixWPMailFromAddress
WordPress phpmailer_init Action(s): NF_EmailTelemetry->update_metrics
Postman: 2.0.2
Postman Sender Domain (Envelope|Message): lflarm.se | lflarm.se
Postman Prevent Message Sender Override (Email|Name): No | No
Postman Active Transport: SMTP (smtp:tls:plain://smtp.lflarm.se:587)
Postman Active Transport Status (Ready|Connected): Yes | Yes
Postman Deliveries (Success|Fail): 405 | 32

The page I need help with: [log in to see the link]