agencycm

Indeed everything is fine with SMTP. The issue relates to the HTTP API and changes in a recent WP update.

We are trying to find a resolution and in communication with the team at SparkPost. If you can use SMTP in the interim I would do so.

You can try editing your .htaccess file

Add the following line

RewriteRule .* – [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]

It needs to come right after the rewrite engine on rule

As a result your .htaccess might look a little something like this:

# BEGIN WordPress
# The directives (lines) between BEGIN WordPress and END WordPress are
# dynamically generated, and should only be modified via WordPress filters.
# Any changes to the directives between these markers will be overwritten.
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule .* – [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress