Your alternative to Port25 PowerMTA

MailerQ: The most powerful MTA

Are you currently using Port25’s PowerMTA for your email infrastructure, or are you considering it as an option?
We’re convinced MailerQ is the better solution, and we bet you’ll agree.

MailerQ beats PowerMTA in performance

MailerQ can process emails over three times as fast as PowerMTA

With MailerQ, message queues are stored in your server’s RAM instead of on disk. It relies on RabbitMQ for queue handling and uses multiple parallel threads to make sure one slower connection does not affect the others. That’s how you get more performance using less expensive hardware with MailerQ.

MailerQ PowerMTA
3000 emails / second 900 emails / second
Benchmarked on a machine with 16GB DDR4 RAM, 8th generation Intel i7, SSD. Using the same message size and the most efficient (single threaded) injection method for either MTA (AMQP injection for MailerQ, direct pickup from spool-directory for PowerMTA).

MailerQ beats PowerMTA in ease of use

No need to modify XML configuration files to set up delivery policies like with PowerMTA. With MailerQ, all deliverability settings - such as delivery rates, IP warmup schedules, message reroutes, IP pools and server response patterns - are stored in a relational (SQL) database and can be modified from an intuitive web-based management console on the fly. This can be done either for an individual instance or for an entire cluster of MailerQ MTAs, depending on your setup.

Learn more about MailerQ management console

Management Console

MailerQ PowerMTA*
Live SMTP traffic monitor
Live logfile monitor
Delivery settings
Automatic recognition of domain groups
Pause and resume campaigns based on message tags

* The PowerMTA management console is only available from version 4.5 with a separate license.

MailerQ beats PowerMTA in control

On top of controlling and getting insights into deliveries on the level of IP(-pool) and recipient domain, with MailerQ you’ll get an extra message selection parameter: tags. With tags, you can categorize messages into a campaign, customer, type of message, priority - basically anything you can imagine. You can add as many tags to a message as you want. This allows you to for example monitor, pause, cancel or reroute individual campaigns on the fly, and process results on any level of detail you desire.

MailerQ beats PowerMTA in result processing

While MailerQ also provides central log files, the use of RabbitMQ and JSON enables users to get more detailed information about successful or unsuccessful mail deliveries. Log files are much more limited compared to the JSON result objects. For example, the result JSON also holds a chain of all delivery attempts so you can exactly see what happened to your message before it got delivered or failed.

Result processing

MailerQ PowerMTA
Log files
Customizable log formating
Aggregated delivery results
MailerQ PowerMTA
A stable mail transfer agent
Frequent community-driven updates and improvements
Compliant authentication and security support
Easy campaign-level insights and control
Maximum performance due to memory-centred architecture

Eager to learn more? Request a demo or get in touch with one of our experts.

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Get started with MailerQ

Want some hands-on experience yourself? Setting up MailerQ takes about 10 minutes.

Just follow the MailerQ installation guide to get MailerQ up and running on your own computer or on a server.

Create a trial

More features comparison

Injection mechanisms

MailerQ PowerMTA
Pickup directory
Command Line Interface
Message compression before sending

MIME handling

MailerQ PowerMTA
Header insertion/modification
CSS stylesheet to attributes
JSON to MIME conversion
DKIM message signing
ARC message signing

Advanced settings

MailerQ PowerMTA
Support for clustering
Support for chaining
Smarthost support
C/C++ plugin API

Incoming messages

MailerQ PowerMTA
DMARC report handling
DSN handling
Local address database

Delivery parameters

MailerQ PowerMTA
Domain MTA and IP based rates
Support for per-message overrides
SMTP reply pattern matching
Configurable deferral periods

Validation mechanisms

MailerQ PowerMTA
Spam Assassin

Supported SMTP extensions

MailerQ PowerMTA
DNS handling