Emails From -> “on behalf of”

Hello,

Below you’ll find the diagnostic test report:

Mailer: postsmtp
HostName: example.com
cURL Version: 7.29.0
OpenSSL Version: NSS/3.53.1
OS: Linux ${servername} 3.10.0-1160.95.1.el7.x86_64 #1 SMP Mon Jul 24 13:59:37 UTC 2023 x86_64
PHP: Linux 8.1.27 C
PHP Dependencies: iconv=Yes, spl_autoload=Yes, openssl=Yes, sockets=Yes, allow_url_fopen=Yes, mcrypt=No, zlib_encode=Yes
WordPress: 6.4.3 en_US UTF-8
WordPress Theme: Page Builder Framework
WordPress Plugins: Post SMTP, - ACF Dropzone (Modified), Advanced Custom Fields PRO, All In One WP Security, Classic Editor, Password Generator Field for ACF, - Website Customizations Plugin, Advanced Editor Tools, - Title Document Portal, User Role Editor, User Switching, Page Builder Framework Premium Addon
WordPress wp_mail Owner: /httpdocs/wp-content/plugins/post-smtp/Postman/PostmanWpMailBinder.php
WordPress wp_mail Filter(s): wp_staticize_emoji_for_email, PostsmtpMailer->get_mail_args
WordPress wp_mail_from Filter(s): SiteCustomizations\Common\Controllers\Common->change_from_email_address
WordPress wp_mail_from_name Filter(s): SiteCustomizations\Common\Controllers\Common->change_from_name
Postman: 2.8.11
Postman Sender Domain (Envelope|Message): example.com | example.com
Postman Prevent Message Sender Override (Email|Name): No | No
Postman Active Transport: Default (smtp:none:none://localhost:25)
Postman Active Transport Status (Ready|Connected): No | Yes
Postman Deliveries (Success|Fail): 24 | 0

When I send a test email I do see the “on behalf of”.

Additionally, I’m using the following hook to ensure that WordPress is not in the emails:

add_filter( 'wp_mail_from', function() {
	$url_parts = parse_url( home_url() );
	return sprintf( 'noreply@%s', $url_parts['host'] );
} );

add_filter( 'wp_mail_from_name', function() {
	return get_bloginfo( 'name' );
} );

If I disable this plugin, the filter hooks work as expected, and I do not see the “on behalf of” described in my initial post.

Hello,

I’ve set these values in the plugin and the issue persists.

I’ve disabled my filter hooks and the issue persists.

I’ve used the WordPress Health Check & Troubleshooting tool to ensure that only Post SMTP is active, and the issue persists.