Md Bahar S.

Is your SMTP server failing, MailWizz campaigns bouncing, or email authentication causing delivery problems? I help businesses, marketing agencies, and outbound teams set up, troubleshoot, and maintain reliable SMTP servers and self-hosted email infrastructure. **Top Rated Upwork Freelancer | 100% Job Success Score | 49 Completed Jobs** I specialize in PowerMTA, KumoMTA, MailWizz, Mautic, Linux VPS, SMTP configuration, email authentication, and deliverability troubleshooting. ### SMTP & Email Infrastructure Services **SMTP Server Setup & Configuration** - PowerMTA and KumoMTA setup, configuration, and troubleshooting - Linux VPS and dedicated server configuration - SMTP routing, queue management, and performance optimization - Multi-server infrastructure and email system integration **MailWizz & Mautic** - Installation, configuration, and upgrades - SMTP and delivery server integration - Bounce server configuration and troubleshooting - Application maintenance and technical support **Email Deliverability & DNS** - SPF, DKIM, DMARC, MX, PTR/rDNS configuration - SMTP delivery error and bounce diagnosis - Sender reputation and blacklist investigation - Email authentication and infrastructure audits **Cold Email & Self-Hosted Infrastructure** - Multi-VPS email account infrastructure - SMTP and outbound platform integration - Domain and server configuration - Monitoring and troubleshooting for compliant sending operations **Ongoing SMTP Maintenance** - Server health checks and configuration reviews - Queue, bounce, and delivery error monitoring - MailWizz and Mautic maintenance - Technical troubleshooting and infrastructure optimization ### Relevant Upwork Experience My completed projects include: - MailWizz and email server setup and configuration - PowerMTA infrastructure involving multi-IP and multi-domain requirements - SMTP server configuration, upgrades, and maintenance - Email account infrastructure across six VPS servers - Self-hosted email account setup and Instantly integration - Mautic configuration and troubleshooting - MailWizz bounce server and deliverability support Clients have recognized my technical expertise, reliability, communication, and commitment to quality. ### How I Work I start by understanding your existing infrastructure, technical requirements, and delivery problems. Then I recommend a practical solution, configure or troubleshoot the required components, verify the setup, and explain the next steps. I focus on stable, maintainable infrastructure and realistic sending requirements—not promises of unlimited sending or guaranteed inbox placement. ### Need Help With Your Email Infrastructure? Send me a message with your current server setup, the problem you are facing, and what you want to achieve. Whether you need a quick SMTP fix, a complete infrastructure setup, or ongoing technical maintenance, I can help you determine the next steps.