The MailerQ Insider’s Guide
Everything we know about MailerQ in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
MailerQ
The Insider’s Guide
Self-hosted mail transfer agent for high-volume email sending
Every plan, grade, refund rule and rival among email sending services, read from MailerQ’s own pages.
Made by Copernica BV · checked Nov 13, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from MailerQ’s own pages, its app-store listings and our grades. Every fact in it is on MailerQ’s page too, where it is kept up to date. Checked Nov 13, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
1.6
GPA, above 1 of the 50 other email sending services we grade
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.
To get you started, here are 9 things to know about MailerQ, taken from its own pages and our grades.
It's installed on your own servers and uses RabbitMQ and a MySQL or PostgreSQL database.
- 1
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.
- 2
What it costs
Paid plans start at €10,000 one-time per instance, plus €2,000 a year for updates and support.
- 3
You can try it first
Free trial license available on request from the site; length not stated.
- 4
It runs on Web
Web.
- 5
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.
- 6
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.
- 7
IP warm-up schedules
Throttle schedules define the sending rate to use on each day for a new IP address.
- 8
A 1.6 GPA, above 1 of 50
That is against the other email sending services we grade, on value, the free plan, features, ease of use and platforms.
- 9
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.
MailerQ at a glance
- Pricing
- Free trial, from €10,000 one-time per instance, plus €2,000 a year for updates and support
- Free plan
- No
- Free trial
- Free trial license available on request from the site; length not stated.
- Runs on
- Web
- Made by
- Copernica BV
- Category
- Email Sending Services
- Our grade
- 1.6 GPA, weak
The report card
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.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | D | €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. |
| Free plan and trial | D | A trial license is available on request, with the length not stated. |
| Features | B | Management 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. |
| Ease of use | D | No store rating on record. It's installed on your own servers and uses RabbitMQ and a MySQL or PostgreSQL database. |
| Platforms and integrations | C | Software for your own servers with a REST API and injection methods. The pages don't name supported operating systems. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
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 it 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
Good to know
Good for
- Email service providers and platforms sending millions of messages a day
- Teams that want to run their own sending infrastructure and IP reputation
- Senders that need per-provider throttling and detailed delivery logs
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.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
€10,000 one-time
To start
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.
A trial license is available on request, with the length not stated.
Regular
€10,000
one-time fee per instance
Perpetual license: 100K emails per hour, 10 domains, management console. Updates and support cost €2,000 a year.
Enterprise
€25,000
one-time fee per instance
Perpetual license: unlimited emails per hour and domains, management console. Updates and support cost €5,000 a year.
Trying it first
Free trial license available on request from the site; length not stated.
Read from mailerq.com on Nov 13, 2026.
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
1
Place it runs: Web
Self-hosted mail transfer agent for high-volume email sending. Here is what it does, as its own site describes it, and what it covers: self-hostable, public API, inbox warm-up, dMARC, transactional email.
Management console, throttling, IP warm-up schedules, bounce and feedback handling, authentication and a REST API.
- 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.
Where it runs
- Web
What it works with
- RabbitMQ
- MySQL
- PostgreSQL
MailerQ is made by Copernica BV.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
1/50
Other email sending services it is graded above
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
- DFree plan and trialAbove 8 of 50
- BFeaturesAbove 30 of 50
- DEase of useAbove 0 of 50
- CPlatforms and integrationsAbove 0 of 50
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
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.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
KumoMTA, Bird Email, SocketLabs and Mailgun
The 4 tools MailerQ is most often weighed against, with where each one differs from it.
- 2.2GPA
KumoMTA
Free plan · from $5,000/yr
Open-source mail server for high-volume, self-run email sending.
- KumoMTA has a free plan. MailerQ does not, though it has a free trial.
- Only MailerQ lists a web app.
- Only KumoMTA lists a Linux app.
- 2.6GPA
Bird Email
Free plan · from $15/mo
SparkPost's successor: Bird's email API, paid from a prepaid balance.
- Bird Email has a free plan. MailerQ does not, though it has a free trial.
- MailerQ is self-hostable, according to its own site.
- MailerQ also covers inbox warm-up and dMARC.
- 2.2GPA
SocketLabs
Free trial · from $39.95/mo
Email delivery over SMTP or API, with built-in analytics.
- MailerQ is self-hostable, according to its own site.
- MailerQ also covers inbox warm-up and dMARC.
- SocketLabs also covers reports.
- 2.4GPA
Mailgun
Free plan · from $15/mo
Email API and SMTP relay for developers, with list validation.
- Mailgun has a free plan. MailerQ does not, though it has a free trial.
- MailerQ is self-hostable, according to its own site.
- MailerQ also covers inbox warm-up and dMARC.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
13
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is MailerQ free?
No, MailerQ is a paid product, but you can try it first. Free trial license available on request from the site; length not stated.
How much does MailerQ cost?
MailerQ lists 2 plans. Regular: €10,000 one-time fee per instance.
What platforms does MailerQ work on?
MailerQ is available on Web.
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.
What does MailerQ integrate with?
MailerQ's listing names RabbitMQ, MySQL and PostgreSQL. A listing names up to eight integrations, so it may connect to more.
Who makes MailerQ?
MailerQ is made by Copernica BV.
What are the alternatives to MailerQ?
The closest alternatives to MailerQ in our directory are KumoMTA, Bird Email, SocketLabs and Mailgun.
How does MailerQ compare with other 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.
Could I make my own version of MailerQ?
To replace MailerQ you would be making mail servers with a good name among inbox providers.
Where this guide comes from
The prices, plans, platforms and features were read from MailerQ’s own pages on Nov 13, 2026, and the grades were given on Nov 13, 2026. 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.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by Copernica BV. Prices change, so check mailerq.com before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
7,721
Tools graded, in 95 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
7,721
tools graded
95
categories
739
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- MailerQ, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/mailerq
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "MailerQ: The Insider's Guide", checked Nov 13, 2026. https://toolgpa.com/tools/mailerq
Know someone choosing between email sending services?
Send them this guide: toolgpa.com/tools/mailerq/guide
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See our other guides
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- Amazon SES Insider's GuideAWS email sending and receiving, paid per 1,000 emails2.8 GPA
- Forward Email Insider's GuideOpen-source email forwarding and hosting for custom domains2.8 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what MailerQ’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. MailerQ is a trademark of its owner, and this guide is not made, paid for or approved by Copernica BV. Prices and plans change: check mailerq.com before you buy.