PowerMTA by Sparkpost

Get total control of your email deliverability with PowerMTA

ESPs, deliverability pros, and high-volume senders use PowerMTA to send marketing and transactional emails that will always land.

PowerMTA for mission-critical email operations

PowerMTA by SparkPost is an email message transfer agent (MTA) built for scalable, reliable, and timely email delivery.

Used by over 70% of the world's largest ESPs, PowerMTA drives email at MailChimp, Microsoft, Adestra, and other major senders.

As a high-performance alternative to open source MTAs and smaller competitors, PowerMTA sends high-volume marketing and transactional emails following the latest standards, mailbox provider guidelines, and deliverability best practices.

PowerMTA is considered best-in-class by email service providers and on-premise senders.

PowerMTA by Sparkpost

Why choose PowerMTA
as your email delivery software?

PowerMTA by Sparkpost

Pay once, send unlimited emails

Stop paying bills that punish your growth.

PowerMTA by Sparkpost

Total control over your sending

Optimize every detail of your configuration.

PowerMTA by Sparkpost

Full visibility over deliverability

Know exactly why emails bounce.

PowerMTA by Sparkpost

Keep your data private

Your list, your servers, your eyes only.

PowerMTA vs SMTP providers

PowerMTA vs smaller competitors

PowerMTA vs open source MTAs

PowerMTA by Sparkpost

Get help from the most experienced email consultants in the market

Set up, optimize, monitor or migrate your PowerMTA with assistance from Maarten Oelering and a team of renowned email engineers.

PowerMTA by Sparkpost


With 200+ parameters, installing PowerMTA gets overwhelming. Postmastery does it for you, meeting your email delivery requirements.

PowerMTA by Sparkpost


Fix limited throughput, long delivery times, errors, retries and other provider-specific issues. Get PowerMTA sending at full potential.

PowerMTA by Sparkpost


Postmastery proactively monitors your infrastructure and logs to ensure your emails are hitting the inbox.

PowerMTA by Sparkpost


Specialists are ready to migrate your PowerMTA(s) to new on-prem hardware or cloud (AWS, Azure etc.)

Optimal delivery to the biggest inbox providers

Send more emails with a single server

A single PowerMTA can handle 1M to 3M messages an hour. Configure virtual MTAs to separate mail streams and IPs on a single server, and grow your sending volume.

  • High performance on commodity servers
  • Parallel delivery of multiple mail streams
  • Send over many IPs from a single server
PowerMTA by Sparkpost

Optimize your sending at all levels

Define and manage your settings at global, provider, domain, IP, and pool levels. PowerMTA makes it easy to comply with mailbox provider guidelines.

  • Protect reputation with automatic backoff
  • Automatic IP warm-up
  • Global, provider, domain, IP, and pool level config

Get more data to analyze and fix your sending

See meaningful transaction data for each message that leaves your server. Understand why emails bounce and the response behind each recipient.

  • Process bounces and FBL reports
  • Send delivery events via webhooks
  • Integrate with reporting tools
PowerMTA by Sparkpost
PowerMTA by Sparkpost

Keep your reputation safe according to the latest standards

Build a fully compliant email operation. As a market leader, PowerMTA is always on top of the latest email standards and provider guidelines.

  • Customer DKIM
  • Double DKIM signing
  • Control over the use of TLS
  • Support for DANE

Who is PowerMTA for?

PowerMTA by Sparkpost

Email Service Providers

PowerMTA is the email delivery software of choice for more than 70% of ESPs in business.

PowerMTA by Sparkpost

Large brands

You've outgrown your current setup and want to manage multiple IPs and domains at an affordable price.

PowerMTA by Sparkpost

Marketing agencies

You need to increase your sending and want a secure, reliable platform to manage your campaigns.


Postmastery is a SparkPost PowerMTA professional service partner and global reseller

Setting up your own mail transfer agent can be a daunting task. Postmastery will assess your business and suggest a setup that matches your sending volume and email marketing needs, at a price your company afford.

PowerMTA by Sparkpost

How Bluetooth sends millions of business-critical emails with PowerMTA
"PowerMTA and Postmastery provided us with the ultimate Azure-based email solution. Fully managed with 100% visibility." 
Jeremy Syme | Program Manager at Bluetooth