Only product reviews going to Google workspace email (same email)

I don’t know how this is possible but noticed this today when I logged into my Google workspace account I had all kinds of CS-cart product reviews to approve in gmail. I don’t ever use my workspace/gmail for this email address (sales@mydomain.com). I use an email client for all my daily emails and I get hundreds per week to it including customer testimonial reviews for my CS-cart site. So how is it possible only product reviews are getting routed to Google workspace?

Tracing the email I suspect it has something to do with the test-google-a.com but still not sure why just the product reviews are going here.

Delivered-To: sales@mydomain.com.test-google-a.com
Received: by 2002:a05:7022:7a2:b0:8f:dcb:954a with SMTP id 34csp5611332dlg;
        Fri, 8 Nov 2024 21:24:28 -0800 (PST)
X-Google-Smtp-Source: AGHT+IHSsrZrbfGN6UlrkvDSxRnms80J8Ruz/RMmqFeZMoJe420ygUU3iavUbEAOKJUbdVs3NeTn
X-Received: by 2002:a17:90b:544b:b0:2e2:c744:2eea with SMTP id 98e67ed59e1d1-2e9b1f61091mr8789716a91.13.1731129868337;
        Fri, 08 Nov 2024 21:24:28 -0800 (PST)
ARC-Seal: i=1; a=rsa-sha256; t=1731129868; cv=none;
        d=google.com; s=arc-20240605;
        b=HwuHIGrRYyEr5uyTSIANie3Id5O9pBwyrRe0a6Duihgpr4WIBeB4UV7E0XrDD+UAmE
         SyWf/xuzyeM/nS1XP5e+r3DKPlWk02bDK+URfOuuRlWGOpmT+Q2Ipkbfz+x0Zc3+B71q
         Dg6ZmtO+Psp85hBl5o88RD6IkVX5EjVZuEF6MUTQFuE+uK3ZqOZFMPP2kVeT+u9wNbfS
         E4+/GpDDULE2zU8E9bf4bFr+coN1ephMhPcBFGo7Z7MR2MRL6ZU1KAuhpuvTSA3HXlF0
         j7MkUj9RsMr311iR+mFAAX0NYCycxsL3SWmcK63HQppp9eQp4z5GosimC9scoN4SKPxO
         CBKQ==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20240605;
        h=mime-version:message-id:from:date:subject:to:dkim-signature;
        bh=lxo66qq8vExug5INwGrzmlK44v/20tYS/b7OdZKsg3M=;
        fh=qcnAdsWXTSEtI7Qntke8zKsM1L+gR3DONB3o7HSOGEs=;
        b=RgVxDOtiEj0zChWNpqLt2SnGPlc7XO9yBmi2s7s2uO4Xz2uqE/RIf1EUABXfZXQ3yp
         J4Wj9prJqDsc/tlOlpcJsIa5VxTBiMTLILsFmH31ULAPcxsh8/tY0W7Kt5Lv60QTz2yZ
         tFV40j9nYwbiW5PuNWJMqqFqoRAzDlIlvTZqaKh7ZJfUErl93dPI+Es20/dRwMH+Y3ST
         xMJkHYDwS0dl0IhvSTKYg6BZABqtZB3GRglRXjX2x8DanrX9VKpsQY1XjOjTwwI1omn6
         p3bD+nS5EZ3FdCdM4uKFPNRTJWIJdwz3896O9DageX3Y21e6QoI7fWckIz6/Omeno1qp
         7FdA==;
        dara=google.com
ARC-Authentication-Results: i=1; mx.google.com;
       dkim=policy (weak key) header.i=@mydomain.com header.s=default header.b=joHLM0po;
       spf=pass (google.com: domain of sales@mydomain.com designates 192.249.119.63 as permitted sender) smtp.mailfrom=sales@mydomain.com;
       dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=mydomain.com
Return-Path: <sales@mydomain.com>
Received: from server.mydomain.com (server.mydomain.com. [192.249.119.63])
        by mx.google.com with ESMTPS id 98e67ed59e1d1-2e99a666c78si9060925a91.136.2024.11.08.21.24.27
        for <sales@mydomain.com.test-google-a.com>
        (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128);
        Fri, 08 Nov 2024 21:24:28 -0800 (PST)
Received-SPF: pass (google.com: domain of sales@mydomain.com designates 192.249.119.63 as permitted sender) client-ip=192.249.119.63;
Authentication-Results: mx.google.com;
       dkim=policy (weak key) header.i=@mydomain.com header.s=default header.b=joHLM0po;
       spf=pass (google.com: domain of sales@mydomain.com designates 192.249.119.63 as permitted sender) smtp.mailfrom=sales@mydomain.com;
       dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=mydomain.com
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mydomain.com; s=default; h=Content-Type:MIME-Version:Message-ID:From:Date :Subject:To:Sender:Reply-To:Cc:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=lxo66qq8vExug5INwGrzmlK44v/20tYS/b7OdZKsg3M=; b=joHLM0poZvzV6Y8xi8HHvNAI8B eX0e2WOpxu0EV9WOdSS4577Bwt0BQqRrCBrAnkuUhvfEyIhcSMFzxHAO46kZ59wE9ppz6ygbZBTED x5iZb0UTk/zTJar0vtJ1A6bU2;
Received: from mydoma by server.mydomain.com with local (Exim 4.96.2) (envelope-from <sales@mydomain.com>) id 1t9dxT-0003jd-1q for sales@mydomain.com.test-google-a.com; Fri, 08 Nov 2024 21:24:27 -0800
To: sales@mydomain.com.test-google-a.com
Subject: Fast Decals: Reviews - Product
X-PHP-Script: mydomain.com/shop/index.php for 2601:645:4201:1760:b96b:3aa5:8989:6200, 162.158.166.210
X-PHP-Originating-Script: 1009:class.phpmailer.php
Date: Fri, 8 Nov 2024 23:24:27 -0600
From: Fast Decals <sales@mydomain.com>
Message-ID: <aa40cc3e53cf96b3991e7c8f685294a9@mydomain.com>
X-Mailer: PHPMailer 5.2.22 (https://github.com/PHPMailer/PHPMailer)
MIME-Version: 1.0
Content-Type: multipart/related; boundary="b1_aa40cc3e53cf96b3991e7c8f685294a9"
X-AntiAbuse: This header was added to track abuse, please include it with any abuse report
X-AntiAbuse: Primary Hostname - server.mydomain.com
X-AntiAbuse: Original Domain - mydomain.com.test-google-a.com
X-AntiAbuse: Originator/Caller UID/GID - [1009 992] / [47 12]
X-AntiAbuse: Sender Address Domain - mydomain.com
X-Get-Message-Sender-Via: server.mydomain.com: authenticated_id: mydoma/from_h
X-Authenticated-Sender: server.mydomain.com: sales@mydomain.com
X-Source: 
X-Source-Args: php-fpm: pool mydomain_com
X-Source-Dir: mydomain.com:/public_html/shop