MailerQ review (2026): is it worth €10,000?
Self-hosted mail transfer agent for high-volume email sending
Black Friday: is there a MailerQ sale?
MailerQ report card
Weak · out of 4.0 · graded Nov 13, 2026
Best for a self-run mail server for very large senders
MailerQ is an on-premise mail transfer agent for companies sending large volumes, with a web console, throttling, IP warm-up and bounce handling. It costs €10,000 one-time per instance plus €2,000 a year, and you run it on your own servers.
Who MailerQ is for
- Fits if you send millions of emails and run your own sending servers
- Makes sense if you want a console to manage IP warm-up and per-provider limits
Who MailerQ is not for
- Skip it if you want a hosted service, as it's software you install and run
- Pricey if you're small: €10,000 up front and €2,000 a year after
- Tight if you send a lot on Regular, which stops at 100K emails an hour and 10 domains
- Watch out: the trial length isn't stated, and the pages don't name supported operating systems
Why MailerQ gets a 1.6
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- DValue for money€10,000 one-time per instance, plus €2,000 a year for updates and support. That's many years of the category's middle subscription at $15 a month, though it's a different kind of product from most of the category.
- DFree plan and trialA trial license is available on request, with the length not stated.
- BFeaturesManagement console, throttling, IP warm-up schedules, bounce and feedback handling, authentication and a REST API. Nothing in the listing is missing from the job of a mail transfer agent.
- DEase of useNo store rating on record. It's installed on your own servers and uses RabbitMQ and a MySQL or PostgreSQL database.
- CPlatforms and integrationsSoftware for your own servers with a REST API and injection methods. The pages don't name supported operating systems.
What these grades rest on. Graded from this listing, whose facts were read from MailerQ's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
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<a href="https://toolgpa.com/tools/mailerq#review"><img src="https://toolgpa.com/badge/mailerq.svg" alt="MailerQ: 1.6 GPA on ToolGPA" width="196" height="56"></a>Where MailerQ stands among email sending services
MailerQ's GPA of 1.6 is higher than 1 of the 50 other email sending services we grade, and level with 2.
It stands best on features (B, above 30 of 50) and worst on value for money (D, above 0).
Each grade against the category
Every bar is all 51 email sending services we grade, cut by the letter each got. MailerQ’s own letter is outlined.
- DValue for moneyAbove 0 of 50, level with 7
- DFree plan and trialAbove 8 of 50, level with 2
- BFeaturesAbove 30 of 50, level with 20
- DEase of useAbove 0 of 50, level with 6
- CPlatforms and integrationsAbove 0 of 50, level with 16
Keep MailerQ, or make your own?
Keep it
To replace MailerQ you would be making mail servers with a good name among inbox providers. That is not a weekend's work, with an AI app builder or without one.
That makes this kind of software worth paying for, not this one in particular: 47 of the 50 other email sending services grade higher. It costs $11,172, paid once.
What you could not
- Mail servers with a good name among inbox providers.
- A network of real inboxes that open and answer your emails.
- Reading the reports inbox providers send about your domain.
- It plugs into other products, RabbitMQ, MySQL and PostgreSQL among them, and has an API.
- The depth: we grade its features B, which means it covers the whole job.
What this rests on. MailerQ’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is MailerQ?
MailerQ is an on-premise mail transfer agent for companies that send large volumes of email from their own servers. It comes with a web management console, a REST API, per-provider throttling, IP warm-up schedules and bounce and feedback-loop handling. It is sold as a perpetual license per instance, priced in euros.
Worth knowing
- It is software you install and run on your own servers; the vendor describes it as on-premise, and it uses RabbitMQ and a MySQL or PostgreSQL database.
- Prices are in euros, per instance. Updates and support are an extra yearly charge of 20% of the license fee.
- The Regular license caps sending at 100K emails per hour and 10 domains.
- The pages do not name supported operating systems.
Key features
- Management console
- A web console shows delivery attempts, queues, error logs and statistics per IP, target domain or tag, and lets you change deliverability settings.
- Throttling and flood patterns
- Sets delivery rates for each source IP and target domain, and slows or pauses sending when a receiving server answers with rate-limit messages.
- IP warm-up schedules
- Throttle schedules define the sending rate to use on each day for a new IP address.
- Bounce and feedback processing
- Response patterns classify bounces, process feedback loops and trigger follow-up actions such as retrying or failing a delivery.
- Email authentication
- Supports DKIM, SPF, DMARC, TLS and ARC, according to the vendor.
- REST API and injection methods
- Messages can be injected in five ways, including AMQP, and a REST API can pause or cancel selected deliveries.
MailerQ pricing
As of Nov 13, 2026, MailerQ is a paid product with a free trial, starting at €10,000 one-time per instance, plus €2,000 a year for updates and support.
- Starts at
- €10,000 one-time per instance, plus €2,000 a year for updates and support
- Free plan
- None
- Free trial
- Free trial license available on request from the site; length not stated.
| Plan | Price | What you get |
|---|---|---|
| Regular | €10,000one-time fee per instance | Perpetual license: 100K emails per hour, 10 domains, management console. Updates and support cost €2,000 a year. |
| Enterprise | €25,000one-time fee per instance | Perpetual license: unlimited emails per hour and domains, management console. Updates and support cost €5,000 a year. |
Read from mailerq.com on Nov 13, 2026. Prices change, so confirm with MailerQ before you buy.
Works with
- RabbitMQ
- MySQL
- PostgreSQL
MailerQ alternatives
- MailerQ vs KumoMTA
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- MailerQ vs Bird Email
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- MailerQ vs SocketLabs
Free trial · from $39.95/mo
- MailerQ vs Mailgun
Free plan · from $15/mo
Common questions
Does MailerQ have an Android app?
No Android app was listed when its pages were read on Nov 13, 2026. MailerQ is listed for Web.
Does MailerQ have an iPhone app?
No iPhone app was listed when its pages were read on Nov 13, 2026. MailerQ is listed for Web.
Is MailerQ open source?
MailerQ is not described as open source on its own site, as read on Nov 13, 2026.
Can MailerQ be self-hosted?
Yes. MailerQ's own site says it can be run on a server of your own.
Does MailerQ have an API?
Yes. MailerQ offers a public API, according to its own site.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 13, 2026.