Built by someone who runs the servers, not just writes about them

PowerMTA.in was started in 2025 as a practical knowledge base for running and troubleshooting email infrastructure, with an emphasis on real-world SMTP, DNS, authentication and deliverability work.

The site began as a place to document working setups: MTA configuration on VPS infrastructure, MailWizz and Sendy integrations, DNS records, authentication and deliverability troubleshooting. It has grown into a broader technical resource while keeping the same standard: practical guidance, careful review and clear explanations rather than recycled summaries.

We built our free tools — including the SPF, DKIM and DMARC generators and the subject line tester — because we needed them ourselves and couldn't find versions built with Indian ESPs and use cases in mind.

• Email infrastructure — SMTP, DNS, SPF, DKIM, DMARC, TLS, sender reputation, troubleshooting and MTA operations.
• Deliverability and email operations — authentication, bounces, warm-up, reputation, headers and operational workflows.
• Free tools — SPF, DKIM, and DMARC generators, subject line testers, and other utilities we built for our own use.
• Related email education — selected email-marketing topics and browser-based utilities where they support the core infrastructure audience.

PowerMTA.in is free to use, with no paywalls or paid memberships. The site may be supported through transparent display advertising, including Google AdSense, and affiliate commissions where qualifying affiliate links are used:

Have a question, correction, or partnership inquiry? We read and respond to every message.