Failures From Unverified Address but Address Is Verified

I am getting the following error message:

“We’ve noticed that emails are being sent from the following unverified email addresses:

[email protected]

Please verify these email addresses with Amazon, or use an email address that has already been verified.”

Thing is, I just checked in my AWS SES and that address is verified and so is the entire domain. When I send a test from that address via AWS SES it comes through without issue.

I am intending to use the Newsletter plugin to send out subscription confirmations and the newsletters themselves using that [email protected] address. Right now, people who are subscribing via the online form are not receiving their confirmation emails.

Anyone know what might be going on? Below is my diagnostic info from the plugin:

site_url(): https://longhairrecords.com
home_url(): https://longhairrecords.com
Web Server: Apache/2.4.29 (Ubuntu)
WordPress: 5.3.2
WP Locale: en_US
PHP: 7.2.24-0ubuntu0.18.04.1
PHP Memory Limit: 128M
WP Memory Limit: 40M
Memory Usage: 14 MB
WP Max Upload Size: 128 MB
PHP Time Limit: 300
PHP Error Log: 
MySQL: 5.7.28
Database Name: longhairrecords_wp
Table Prefix: wp_
ext/mysqli: yes
cURL: 7.58.0
OpenSSL: OpenSSL 1.1.1  11 Sep 2018
fsockopen: Enabled
allow_url_fopen: Enabled
Zlib Compression: Enabled
Basic Auth: Disabled
Proxy: Disabled
Blocked External HTTP Requests: None

Send Mail Using SES: On
Enable Open Tracking: On
Enable Click Tracking: On
Region: us-west-2
Log Duration: 90

WPOSES_SETTINGS: Not defined
WPOSES_LICENCE: Not defined
AWS_USE_EC2_IAM_ROLE: Not defined

WP_DEBUG: No
WP_DEBUG_LOG: No
WP_DEBUG_DISPLAY: Yes
SCRIPT_DEBUG: No
WP_CONTENT_DIR: /var/www/html/longhairrecords/wp-content
WP_CONTENT_URL: https://longhairrecords.com/wp-content
UPLOADS: Not defined
WP_PLUGIN_DIR: /var/www/html/longhairrecords/wp-content/plugins
WP_PLUGIN_URL: https://longhairrecords.com/wp-content/plugins

Active Theme Name: Longhair Records
Active Theme Version: 1.0.0
Active Theme Folder: longhairrecords
Parent Theme Name: Divi
Parent Theme Version: 4.0.9
Parent Theme Folder: Divi

Active Plugins:
Advanced Woo Search (v1.90) by ILLID
All-in-One Event Calendar by Time.ly (v2.6.1) by Time.ly Network Inc.
Custom Fonts (v1.2.0) by Brainstorm Force
Dashboard Widgets Suite (v2.4) by Jeff Starr
ELEX EasyPost WooCommerce Extension (v1.9.0) by ELEX
Email Log (v2.3.1) by Sudar
Google Analytics for WordPress by MonsterInsights (v7.10.2) by MonsterInsights
MyFontsWebfontsKit #3730710 (v0.1) by MyFonts Team
Newsletter (v6.4.1) by Stefano Lissa & The Newsletter Team
Page Loading Effects (Preloader) (v2.0.0) by esstat17
Pixel Caffeine (v2.1.1) by AdEspresso
Popups for Divi (v1.7.1) by Philipp Stracker
WP Offload SES Lite (v1.3) by Delicious Brains
WooCommerce (v3.8.1) by Automattic
WooCommerce Admin (v0.23.2) by WooCommerce
WooCommerce Extra Product Sorting Options (v2.8.1) by SkyVerge
WooCommerce Square (v2.0.8) by WooCommerce
Yoast SEO (v12.7.1) by Team Yoast

Must-use Plugins:
ET Support Center :: Must-Use Plugins Autoloader (v) by Elegant Themes