Email Deliverability — Warm-up Infrastructure System

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High-Reputation Email Ecosystem for Large-Scale Sending

Overview:

 

ZenixOps built a complete email infrastructure from the ground up — integrating MailWizz, MailBaby, and custom domain warm-up logic to achieve enterprise-grade deliverability.
The system handles domain rotation, IP reputation monitoring, and bounce management through an automated warm-up engine across 10+ domains.

 

Tech Stack:

 

MailWizz, MailBaby SMTP, SPF / DKIM / DMARC, DNS Manager, Redis, Bash Automation, MariaDB, Cron Jobs

Results:

 

  • Reached 98% inbox rate across Gmail & Outlook

  • Warmed up 160+ sender accounts in 30 days

  • Reduced bounce rate to under 0.3%

  • Stable delivery speed of 1.2M+ emails/month

1M+

Emails Delivered Monthly

20+

Active Sending Domains

1000+

Gmail Seed Accounts

 

Through this project, ZenixOps demonstrated advanced expertise in email infrastructure engineering and deliverability strategy.
The warm-up framework allows brands to maintain consistent inboxing performance while scaling outreach safely and efficiently.

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