Several tools can help you monitor and manage your sender reputation:
Sender Score: Provided by Return Path, Sender Score gives you a numerical rating of your sender reputation. Google Postmaster Tools: Offers insights into your domain's reputation, spam rates, and other metrics for emails sent to Gmail users. Microsoft SNDS: Provides data on your sending practices and helps identify issues affecting your reputation with Microsoft email users. Spamhaus: Monitors your domain and IP address for listings in their spam databases.