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MailCore System · everything for bulk email

Email marketing on your own infrastructure — no limits, no per-subscriber fees

Protosender, Interspire and Mumara mailing platforms, sending through PowerMTA and MailerQ, IP and domain warm-up, team training. We match the tools to your goals and deploy everything turnkey — from the first server to a stable inbox.

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The full email delivery cycle — from one team

Your list contacts and segments stay with you
Mailing platform Protosender · Interspire · Mumara
Sending — MTA PowerMTA · MailerQ · IP pools
Recipient’s inbox Gmail · Outlook · Yahoo · Mail.ru
10+ yrsin email infrastructure
150+mailing systems deployed
50M+emails a month through our setups
95%+inbox placement after warm-up
Built on a proven stack
PowerMTAMTA server
MailerQMTA server
Protosendermailing platform
Interspiremailing platform
Mumaramailing platform
Quick start

What brings you here?

Four typical routes. Pick yours — we’ll show a ready-made answer: email marketing tools, sending infrastructure, or the whole thing at once.

I need a mailing platform

Your own email marketing system instead of renting SaaS: the list stays with you, sending has no limits or per-contact fees.

Choose a platform

I need sending infrastructure

PowerMTA or MailerQ, IP pools, DNS records and monitoring — a reliable delivery channel for your emails.

Set up an MTA

My emails land in spam

IP and domain warm-up, sender reputation, deliverability control — we’ll get your emails back to the inbox.

Fix deliverability Most popular choice

Everything turnkey + training

Servers, platform, MTA, warm-up and team training — we hand over a complete working mailing system.

Launch turnkey
The economics

Email marketing for business: why owning the system beats renting a service

While the list is small, SaaS is convenient. But the list grows — and you pay for every subscriber, every month, ever more. Your own mailing system removes the meter and gives control back.

Renting an email service

Mailchimp, Brevo, SendPulse and other SaaS
  • The bill grows with your list — per subscriber, every month
  • Your contact list lives on somebody else’s servers
  • Moderation: a campaign can be stopped and the account banned with no explanation
  • Shared IPs: your deliverability depends on other people’s campaigns
  • Limits on emails, automations and features — on every plan
The MailCore way

Your own mailing system

Platform + MTA on your server
  • One-time launch cost + an inexpensive server — no subscriber meter
  • The list stays with you only: full privacy and portability
  • No bans, no moderation — you set the rules
  • Your own IPs and domains: reputation builds up and works for you
  • Unlimited sending — volumes grow, the price doesn’t

Calculator

How much are you overpaying?

List size: 50,000 contacts

* A rough estimate based on average pricing of popular email services. We’ll give you an exact quote for your case.

$250/moservice rent at this list size
~$70/moyour own system: server and IPs
$2,160/yryour yearly savings on rent
Get an exact quote for my list
Platform catalog

Email marketing tools:
three platforms for different jobs

We install every platform on your server, configure it, wire it to an MTA and support it. Not sure which to pick — we’ll advise based on your volumes and scenarios.

Built by us · recommended

Protosender

The flagship: bulk email with AI automation For those who need big volumes, a stable inbox and processes on autopilot
  • AI strategies and adaptive campaigns
  • Deliverability center and warm-up out of the box
  • Reserve pools and automatic sending rotation
  • Native PowerMTA integration
  • Reputation control and bounce processing
More about Protosender license and rollout — sized to your volume

Interspire

The self-hosted classic: simple and reliable For a fast start: a clear interface and minimal server requirements
  • Market-proven: years of stable operation
  • A simple email editor and autoresponders
  • Our installer and security hardening
  • AI content generation integration
  • Easy list migration from other systems
More about Interspire license and rollout — sized to your volume

Mumara

The enterprise platform for high volumes For agencies and high-load projects with many sending threads
  • Multi-server sending and balancing
  • Flexible segmentation and trigger sequences
  • Advanced campaign analytics
  • An API to integrate with your product
  • Works with PowerMTA and MailerQ
More about Mumara license and rollout — sized to your volume
In development

MTA-Hub — a web control panel for your sending infrastructure: servers, IP pools, PowerMTA and MailerQ configurations in one interface. Coming soon.

Sending infrastructure

PowerMTA and MailerQ: professional-grade sending for your campaigns

The MTA is the engine of bulk email: it decides which IP, what speed and which rules apply to every provider. We deploy and tune this layer turnkey.

How sending works: from platform to provider

Mailing platform campaigns, segments, content
ProtosenderInterspireMumara
MTA — the sending engine vMTAs, policies, per-provider speeds
PowerMTAMailerQ
IP pools rotation and balancing
Pool A — production warmed up Pool B — new warming up Reserve on standby
Providers each gets its own sending mode
GmailOutlookYahooMail.ru
Install and licensePowerMTA or MailerQ — matched to your volumes and budget
Fine-tuningvMTAs, rotation policies, limits and speeds for every provider
DNS recordsSPF · DKIM · DMARC · PTR · FCrDNS — no errors, no conflicts
IP poolssegmentation by task, warm-up of new addresses, a reserve for dips
Platform integrationbounces and FBL complaints loop back into the system automatically
Monitoringqueues, delivery, IP reputation and blacklists — under watch
PowerMTA

The industry standard of bulk sending: maximum throughput and precise policy control.

product page
MailerQ

A modern MTA with a web interface and flexible real-time routing.

product page
Deploy my sending infrastructure
Deliverability

Emails land in the inbox, not in spam

Sending the email is half the job. The other half is sender reputation — we build it as a process, from the first warm-up email to monitoring every campaign.

IP and domain warm-up ramp volume grows on schedule — reputation grows with it target daily volume Day 1 Day 7 Day 14 .
Days 1–4 · meeting the providers Days 5–10 · ramping the volume Day 11+ · production mode
Per-provider warm-up plansGmail, Outlook and Yahoo warm up differently — each gets its own schedule and limits
Placement controlwe watch where emails land — inbox, Promotions or spam — and react immediately
Sending hygienehard/soft bounces, suppression lists and list cleaning — no reputation burned for nothing
Reserve and auto-rotationwhen reputation dips, traffic shifts to reserve pools — sending never stops
24/7 monitoringblacklists, FBL complaints, MTA queues — we learn about problems before your subscribers do
Check my deliverability we’ll review your DNS and IP reputation for free and tell you what to fix first
AI & automation

Email marketing automation: an AI-driven sending strategy

AI assembles a strategy for your goal and writes the emails, while the engine adapts the campaign on the fly: it watches list reactions and spam thresholds — and decides which email to send next, and through which channel.

AI email generationcopy, subject lines and spin variants for every segment — from a short product questionnaire
Visual strategy builderwelcome series, reactivation, upsells — the flow is assembled from nodes on a canvas
Adaptive rotationspam rate climbs — the engine swaps the email, domain or SMTP channel by itself and keeps sending
Trigger sequencesopened — gets the follow-up; bought — moves to the customer list; silent — we change the angle
I want email on autopilot

“Course sale” strategy in the builderProtosender · AI Strategies

EMAIL · AI Introduction & value variant A · spin ×3 Opened? within 48 hours Yes EMAIL · AI Offer + case study 1-day delay No EMAIL · AI A different angle same goal · fresh copy Bought? via the link Yes LIST Customers → upsells Spam above the 3% threshold email → to reserve · SMTP → cooling down the reserve channel takes over The engine scores list reactions hourly and runs the flow itself — no manual launch for every campaign Strategy active coverage 100% · spam 0.8%
Email Condition List / transition Spam-triggered auto-rotation
Turnkey

Turnkey email marketing launch

No need to figure out MTAs, DNS and warm-up on your own — we walk the whole path for you and with you. Six steps from request to a working system.

from request to the first campaign — usually 5–10 days
01

Request & audit

We unpack the task: volumes, the list, what you already have. If you’ve been sending — we find out why emails hit spam.

02

Stack selection & quote

Platform, MTA, number of servers and IPs — sized to your volumes. The budget is fixed before work starts.

03

Servers & domains

We source and prepare servers, IPs and domains: DNS, PTR — the technical foundation for reputation.

04

Install & configure

Mailing platform + MTA + DNS records + integrations. Everything wired together and verified with test sends.

05

Warm-up & tests

We warm up IPs and domains on schedule, track inbox placement at key providers and ramp to production volume.

06

Training & handover

We train your team, hand over all credentials and documentation — and stay around for support.

The result — your own email marketing system and a team that knows how to run it. No rent, no limits, no dependence on services.
Launch turnkey
We don’t vanish after launch

Training and ongoing care

The biggest fear with self-hosted solutions is “I’ll be left alone with a server.” Not with us: the system is handed over together with knowledge and support.

Team training

We teach your team the platform, segments and campaigns, and explain warm-up rules. Documentation and recordings stay with you — new employees onboard themselves.

Technical support

We watch the infrastructure, update the platform and MTA, and respond to incidents. Questions get solved in a chat — no tickets into the void.

Strategy consulting

We review campaigns, advise on raising open rates and deliverability, and plan volume growth without hurting reputation.

Why MailCore

Why teams trust us with their email

We don’t resell other people’s boxes — we live inside this infrastructure every day: building, configuring, warming up and fixing.

Our own products

We build Protosender and MTA-Hub ourselves. We know the system down to the line of code — not from a vendor manual.

10+ years in infrastructure

Servers, MTAs, warm-ups, blacklists — we’ve stepped on every rake in this niche and baked the lessons into our solutions.

Engineers on the line

Your questions are answered by the person who set up your system — not a manager reading a sales script.

Western and RU providers

Gmail, Outlook, Yahoo, Mail.ru, Yandex — each has its own acceptance rules. We work with both ecosystems.

FAQ

Frequently asked questions about self-hosted email marketing

Short answers to what people ask most. Didn’t find yours — write to us.

Where do I start with email marketing for my business?
With two questions: do you have a list and what volumes do you plan. If the list exists — deploy a mailing platform and sending infrastructure, warm it up and launch the first campaign. No list yet — we start with contact collection and strategy. We’ll suggest the best route in a free consultation.
What do I need for bulk email sending?
Four ingredients: an opt-in list, a platform (Protosender, Interspire or Mumara), sending infrastructure — an MTA, dedicated IPs and domains with correct DNS records, and warm-up with deliverability control. Everything except the list we deploy turnkey.
How much does an owned mailing system cost?
The cost breaks down into server and IP rent (from a few dozen dollars a month), platform and MTA licenses, and one-time rollout work. The total depends on volume — a system for 50,000 contacts and one for 5 million are built differently. After an audit you get an exact quote; unlike SaaS, the costs don’t grow with your list, so payback usually takes just a few months.
How long does the launch take?
Deployment usually takes 5–10 days: servers, domains, installation, configuration, integrations. Warm-up of IPs and domains runs in parallel: the first campaigns start almost immediately at small volumes, and the system reaches full capacity in 2–4 weeks depending on your targets.
Is this legal? What about spam?
We build systems for legitimate email marketing: sending to your own opt-in lists, a mandatory unsubscribe link in every email, proper complaint handling. That is exactly what protects your sender reputation — spam tactics kill domains and IPs within days, so they hurt you first.
My emails go to spam — can you help?
Yes, that’s a routine task for us. We check DNS records (SPF, DKIM, DMARC, PTR), IP and domain reputation, then look at content and list hygiene. Next comes a recovery plan: fix the records, re-warm, or change the infrastructure. Start with a free deliverability check.
Can I migrate from Mailchimp, Brevo or SendPulse?
Yes. We export contacts with their segments and subscription statuses, move them into your platform and set up a smooth transition so the infrastructure switch doesn’t crash deliverability. The old service can stay for a transition period — we’ll help plan the migration.
What is IP warm-up and why do I need it?
To mailbox providers, a new IP and domain are strangers: big volumes from them look suspicious right away. Warm-up is a scheduled, gradual increase in sending so Gmail, Outlook and Yahoo see a stable, trustworthy sender. Without it even honest emails fly to spam — which is why warm-up is part of every launch we do.

MailCore System — email marketing on your side

Email marketing remains the most profitable channel of customer communication — as long as you control the tools. MailCore System brings together everything professional bulk email needs: the Protosender, Interspire and Mumara platforms, sending infrastructure on PowerMTA and MailerQ, IP and domain warm-up, team training and ongoing support.

Unlike rented email services, an owned email marketing system is not billed per subscriber: the list lives on your server, sending is not capped by limits, and sender reputation accumulates on your own IPs and domains. This approach pays off starting from lists of a few tens of thousands of contacts — and the bigger the list, the bigger the savings.

The tools are matched to the job: Protosender is the flagship platform with AI strategies and email marketing automation, Interspire is the proven classic for a fast start, Mumara is the enterprise choice for high volumes. Sending is handled by PowerMTA or MailerQ with policies tuned for every mailbox provider.

An email marketing strategy is built on data: list segmentation, trigger sequences, adaptive rotation of content and SMTP channels based on recipient reactions. We deploy the system turnkey in 5–10 days, train your team and stay on support — from the first warm-up email to million-scale campaigns.