Senior Email Infrastructure Engineer

Weekday 1; United States; On-site; USD 90,000 - 130,000; Full time

Job summary

Weekday 1 is seeking a Senior Network Engineer to diagnose and resolve email delivery failures, bounce-back issues, and network routing problems affecting large-scale communication systems. You will monitor email delivery performance, investigate bounce reports, and optimize mail server configurations for reliability and deliverability.

The role requires strong troubleshooting abilities, familiarity with SMTP protocols, DNS and firewall rules, and knowledge of how network configurations impact

Qualifications

• Strong understanding of email protocols including SMTP, POP3, and IMAP.
• Experience analyzing bounce logs, SMTP response codes, and DSN.
• Knowledge of DNS configuration, MX records, reverse DNS, and email authentication standards (SPF, DKIM, DMARC).
• Familiarity with mail servers such as Postfix, Sendmail, Exim, Microsoft Exchange, or cloud-based email services.
• Solid networking knowledge including TCP/IP, firewalls, routing, and load balancing.
• Experience troubleshooting issues related to email deliverability, spam filtering, and blacklisting.
• Ability to analyze logs, identify patterns, and resolve complex technical issues.
• Strong problem-solving skills with attention to detail.
• Excellent documentation and communication skills.

Responsibilities

• Monitor, analyze, and troubleshoot bounced emails and delivery failures across enterprise systems.
• Investigate SMTP errors, soft bounces, hard bounces, and delivery delays to identify root causes.
• Work with network and infrastructure teams to diagnose DNS, routing, firewall rules, and mail server configurations.
• Maintain and optimize email infrastructure including SMTP servers, gateways, and relay systems.
• Analyze server logs, bounce messages, and delivery reports to resolve technical issues affecting email performance.
• Configure and manage authentication and security mechanisms such as SPF, DKIM, and DMARC.
• Collaborate with product and engineering teams to improve email deliverability and system reliability.
• Monitor network performance and ensure optimal configuration for high-volume email systems.
• Implement preventive measures to reduce bounce rates and ensure successful email transmission.
• Document troubleshooting steps, root cause analyses, and solutions for recurring issues.

Skills

SMTP

IMAP/POP3

Bounce analysis

DNS

MX records

SPF/DKIM/DMARC

Mail servers

TCP/IP

Firewalling

Email deliverability

Tools

Postfix

Sendmail

Exim

Exchange

Job description

Weekday 1 is seeking a Senior Network Engineer to diagnose and resolve email delivery failures, bounce-back issues, and network routing problems affecting large-scale communication systems. You will monitor email delivery performance, investigate bounce reports, and optimize mail server configurations for reliability and deliverability.

The role requires strong troubleshooting abilities, familiarity with SMTP protocols, DNS and firewall rules, and knowledge of how network configurations impact