Urgent: Email Server Configuration and Security Enhancement on Ubuntu Server with aaPanel

Overview: We are seeking an experienced and detail-oriented freelancer to urgently address and resolve issues with our email server hosted on an Ubuntu server using aaPanel. The primary objective is to ensure smooth email sending and receiving functionality, improve email reputation, and address any existing vulnerabilities that might have led to unauthorized use of the email server. Key Requirements: Email Server Configuration: Diagnose and resolve issues preventing emails from being sent and received without errors. Implement strategies to improve email deliverability and ensure emails do not land in the spam folder. Email Reputation Improvement: Analyze current email practices and advise on best practices to maintain a good email reputation. Implement necessary changes to avoid blacklisting and enhance sender reputation. Security Assessment and Enhancement: Conduct a thorough security audit of the Ubuntu server to identify vulnerabilities. Implement security measures to protect the server from unauthorized access and potential hacking attempts. Address specific concerns about the mail server being used without consent, ensuring such activities are halted and prevented in the future. aaPanel Optimization: Ensure aaPanel is correctly configured for optimal performance and security. Address any specific issues related to aaPanel setup and management. Project Deliverables: A fully functional email server with improved deliverability and reputation. A comprehensive security report detailing findings and actions taken. Documentation outlining changes made and recommendations for ongoing maintenance.