Still paying $299 /mo for cold email servers?

Each server gives you 100 domains, 400 mailboxes, and up to 300,000 emails/month — on a dedicated IP with full DNS auto-configuration, mailbox provisioning, and 8-blocklist monitoring. Solo plan servers cap at 10 domains / 40 mailboxes. Same infrastructure, same guardrails.

No. You choose how many domains to start with — 20, 30, whatever suits your client's campaign. Add more whenever you're ready. The 100-domain cap is your ceiling per server, not a minimum. Scale up at your own pace.

Yes. You can start with 20 domains and add more whenever you need them through the Cold Email Engine dashboard. Use Add Domains on the relevant server to purchase and configure additional .com domains in batches. You do not need to buy all 100 domains upfront — you can continue adding domains until you reach the 100-domain-per-server capacity on Pro or Agency. Each new domain is automatically configured with DNS records and mailboxes, ready to export to your sequencer.

Here is what each record does in simple, plain English:

SPF: Tells the internet exactly which servers are legally allowed to send emails for your domain.

DKIM: Adds an un-fakeable digital signature to your emails to prove they came from you.

DKIM Ed25519: A modern, hyper-secure backup signature that works on newer email systems.

DMARC: Tells inbox providers to throw away or flag any emails pretending to be you.

MX: Creates a digital mailbox so your domain can actually receive replies back.

A Record: Links your website's name directly to your server's physical computer address.

MTA-STS: Forces other servers to securely encrypt your emails so nobody can spy on them.

TLS-RPT: Sends you an automatic alert if an email fails to deliver safely.

All eight are configured automatically during your ~15-minute server provision — no DNS panel, no copy-pasting record values, no tutorials to follow. Your sequencer gets a fully authenticated server from the first connection.

Yes. Solo+, Pro, and Agency customers can purchase 10 dedicated Cold Email Engine servers as a single batch. Each server has its own dedicated IP and supports up to 100 domains and 400 mailboxes.

The standard IndexFlow price is $99/month per server.

Buy 3 servers and receive a 10% permanent batch discount.

Buy 5 servers and receive a 20% permanent batch discount.

Buy 10 servers and receive a 30% permanent batch discount, reducing the price to $69/month per server.

Competitor costs can exceed $200/month per server, often on shared networks with additional mailbox and sending fees.

Deal directly with IndexFlow — no reseller markups.

No. Create the two accounts, generate the API tokens, and paste them into IndexFlow. The engine handles everything else automatically.

Go do the research yourself — it's out there, and it's free.

Start on YouTube. Search cold email copywriting and you'll find the people who actually run campaigns for a living breaking down what works and what doesn't. Find out who the recognized names are in this space — the same handful of creators keep coming up across every search, and that's not an accident.

Read the FAQ, blog, and service pages of the popular platforms in this space. They publish real guidance because it helps them sell their own product — use that content even if you never buy from them.

Go to Reddit, Discord, and similar communities where outbound and cold email are actively discussed. These threads are where people admit what actually failed and what actually worked — more honest than most polished guides.

Learn the buzzwords and glossary terms of the space. You can't evaluate advice you don't understand yet, and half the confusion in this industry comes from people using terms without knowing what they mean.

Writing good copy is a skill — not a talent you either have or don't. There are AI tools that will draft it for you entirely, and others that produce a strong first pass you then shape with real human judgment. Either way, educate yourself first. Understand why good cold email copy works before you start playing the game.

It's a valuable skill, and anyone can learn it. Once you've got the fundamentals down, you'll have the patience to master client campaigns properly instead of guessing your way through them.

Yes. Cold Email Engine is a setup and infrastructure tool — not a sending platform. Once your domains and mailboxes are provisioned, export a CSV and import it into Instantly, Lemlist, or any sequencer you use. We handle the infrastructure. You handle the campaigns.

Provisioning takes under 15 minutes and happens in two stages:

Stage 1: Buy domains and configure mailboxes.
Stage 2: All 8 DNS and authentication records are created, and mailbox creation is fully automated.

No terminal, no config files, no vendor consoles. No server setup. No more cold email setup headaches.

Just because you can, doesn't mean you should — here's why.

Think of your server like it's a brand new car. On day one, you don't floor it to 150 mph. Speed like that and the car breaks down fast. Driving within the legal limit keeps you out of trouble — the same logic applies to sending. Push 40 or 50 emails a day per mailbox and you'll get flagged and blocklisted just as quickly.

Industry-standard warm-up guides suggest 15 to 25 sends per day per mailbox post-warm-up. IndexFlow takes this further — for our own outbound campaigns, we cap ourselves at 7 to 9 sends per day per mailbox.

Why? Because it's better to obey the rules than collect speeding tickets. Slow down, stay disciplined, and you reach your sending goals without ever touching spam territory. Our approach is simple: send less, tune the engine back, and do the math for your own use case.

No. IndexFlow provisions and manages everything on your behalf. You never touch a server, a DNS panel, or a registrar dashboard.

No. All domains are purchased through IndexFlow's built-in wizard at registry cost via Porkbun — we don't support importing existing domains. This keeps every domain's setup history clean from day one, which matters for deliverability: a domain with unknown prior use or configuration carries reputation risk IndexFlow can't guarantee against.

No. IndexFlow builds and configures the cold email set up infrastructure only. You export your CSV mailbox credentials into your own sequencer — Instantly, Lemlist, or any provider — and send from there.

IndexFlow caps sending volume per server:

Pro/Agency (100 domains, 400 mailboxes): 300,000/mo
Solo (10 domains, 40 mailboxes): 30,000/mo

Need more volume? Spin up a second server — it's a clean scale-up, not a workaround.

IndexFlow enforces aggregate usage monitoring at the server level — if total volume across your mailboxes starts trending toward something that looks like abuse rather than normal outbound behaviour.

We enforce these standards through real, ongoing monitoring: aggregate usage tracking across every server, hourly checks against 8 major blocklists, and automatic isolation, reprovisioning and redeployment of your server, the moment anything gets flagged.

Cold email professionals need a safe, industry-standard product with best-practice guidelines and sending limits built in and not left to guesswork.

These email server caps exist to protect three things: (1) your agency, (2) your client, (3) your IP reputation.

Batching too many domains onto one server at once signals irregular growth to IP reputation systems.

The cap isn't a limitation — it's the math your own infrastructure can safely support, backed by guardrails doing the 24/7 monitoring and watching so you don't have to.

Follow best practices for cold email delivery with a recommended safe zone of 15-25 sends per mailbox per day, don't burn your IP.

The Cold Email Engine exports a regulated CSV, ready to use safely with Instantly, Apollo, Woodpecker, Lemlist, or any sending provider.

No. The AI-guided provisioning wizard builds your entire server in 15 minutes — including up to 100 domains, 400 mailboxes, and all eight DNS authentication records. You don't touch a server console, write commands, edit a config file, or figure out what DNS records mean. Download your CSV and load it into Instantly, Lemlist, or any sending provider of your choice.

.com domains have the strongest global reputation signals for cold email delivery and you can purchase cheap TLDs (.xyz, .info, .co) that carry inherent trust penalties with major email providers. Our recommendation is to stick with .com.

Yes. Purchase servers on any subscription plan. Batch discounts (3/5/10 servers) are available on Solo, Pro, and Agency. Your first server is permanently 30% off — $69.30/mo, forever, not just month one.

Your domains stay yours. Every domain is registered in your name at registry cost and renews normally if you cancel. You lose the automation layer — provisioning, monitoring, mailbox management — but the domain registrations remain yours.

Yes — one dedicated server per client, each with its own dedicated IP. Your clients are fully isolated from each other at the infrastructure level. If a client needs more volume, provision a second server.

No — and be wary of anyone who claims they can. IndexFlow guarantees the infrastructure side: correct DNS/auth records, dedicated IP isolation, and blocklist monitoring. Your sequencer handles its own built-in warm-up, while inbox placement also depends on your content, list quality, and sending patterns. What IndexFlow does is remove the technical infrastructure barriers before you load the mailbox CSV into your sequencer.

We strongly recommend .com only — it carries the strongest global sender reputation signal and is what every major sequencer and inbox provider trusts by default. Other extensions increase spam filter risk and can hurt deliverability before you've sent a single email.

Our 8-blocklist monitor runs every hour. The moment your IP gets flagged, your server is auto-paused and we reprovision you onto a clean IP.

Strike 1 — Free server reprovisioning. It happens. Clean IP, no charge, no questions.

Strike 2 — $49 activation fee. Something in your sending patterns needs attention. We'll help you diagnose it before reprovisioning.

Strike 3 — Account review. We pause your server and schedule a call before any further reprovisioning. Three flags on the same account means we need to fix the root cause together, not just keep swapping IPs.

You do. IndexFlow provisions and manages everything on your behalf — but every domain is registered in your name. If you ever leave IndexFlow your domains stay with you.

Yes. Add more servers to scale volume linearly. Pro/Agency servers hold up to 100 domains (400 mailboxes) each; Solo servers hold up to 10 domains (40 mailboxes).

Instantly, Salesforge, and Lemlist. The CSV format matches their import requirements exactly.

Every client workspace gets its own dedicated server with a unique IPv4. No shared infrastructure, no shared IP reputation. If one client's sending behaviour triggers a blocklist flag, it affects only that server — it cannot cross the workspace boundary and cannot touch another client's IP, domains, or reputation.