Role: Linux System Administrator (Mail/SMTP – Postfix) 3 Years Experience
Roles & Responsibilities
Managed and maintained Postfix SMTP mail servers on Linux environments (RHEL/CentOS/Ubuntu).
Configured and supported SMTP services, mail routing, and delivery mechanisms.
Monitored and managed mail queues, logs, and server health to ensure smooth mail flow.
Troubleshot email issues such as delivery failures, delays, bounces, and blacklistings.
Implemented and managed SPF, DKIM, and DMARC for secure email authentication.
Worked with DNS records (MX, PTR, SPF) related to email services.
Configured spam filtering and security controls to prevent abuse and spam.
Coordinated with network teams for firewall rules, ports (25, 465, 587), and mail security.
Performed server patching, updates, and system hardening.
Maintained documentation for configurations and troubleshooting steps.
Skills Highlight
Linux Administration
Postfix & SMTP Protocol
DNS Management
Email Security (SPF/DKIM/DMARC)
Log Analysis & Troubleshooting
Basic Networking & Firewall knowledge
Administer and maintain Postfix SMTP servers on Linux (RHEL/CentOS/Ubuntu).
Ensure smooth email flow by monitoring mail queues, logs, and server performance.
Troubleshoot mail delivery issues such as bounces, delays, and blacklist problems.
Configure and manage SPF, DKIM, and DMARC for email authentication.
Handle DNS configurations related to mail services (MX, PTR, SPF records).
Implement spam control and mail security best practices.
Coordinate with network teams for firewall and port configurations.
Perform regular server updates, patching, and system hardening.
