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Cold-email sending infrastructure

Email infrastructure that leaves no shared fingerprint.

Pulse gives every customer its own isolated sending identity — unique MX, SPF, DKIM, TLS certificate and reverse DNS. One burned domain never touches another. Warm-up, IP rotation and deliverability analytics are built in.

Request accessSee how it works
shared records between domains
0
client onboarding
1-click
IP warm-up & rotation
Auto
your IPs, your data
Self-host
What it does

Everything a deliverability team needs, isolated per customer.

Shared sending infrastructure links your customers together — one spam complaint can sink the whole pool. Pulse keeps every tenant in its own sealed environment.

Shared sending poolEvery domain shares all three
MX
acme.com: mx.esp-pool.netnorthwind.com: mx.esp-pool.netglobex.com: mx.esp-pool.net
SPF include
acme.com: _spf.esp-pool.netnorthwind.com: _spf.esp-pool.netglobex.com: _spf.esp-pool.net
Reverse DNS
acme.com: mta-07.esp-pool.netnorthwind.com: mta-07.esp-pool.netglobex.com: mta-07.esp-pool.net
PulseNo record shared
MX
acme.com: mx.acme.comnorthwind.com: mx.northwind.comglobex.com: mx.globex.com
SPF include
acme.com: _spf.acme.comnorthwind.com: _spf.northwind.comglobex.com: _spf.globex.com
Reverse DNS
acme.com: mail.acme.comnorthwind.com: mail.northwind.comglobex.com: mail.globex.com

The same three records for three client domains, read from the outside. Illustrative names.

  • Zero-fingerprint isolation

    Per-domain MX, SPF, DKIM, certificates and reverse DNS. Nothing in the headers or DNS links one customer's domains to another's.

  • IP rotation & warm-up

    Run many IPs, assign them per domain, ramp sending automatically, and rotate off any address the moment it lands on a blacklist.

  • Deliverability analytics

    Delivered, bounced and complaint rates by domain, mailbox, IP and inbox provider — plus reply tracking, DMARC and blacklist monitoring.

  • SMTP, IMAP & webmail

    Standard mailboxes that drop straight into Smartlead, Instantly or any sequencer, with per-domain webmail for every inbox.

  • Sending API & webhooks

    Send programmatically and receive delivery, bounce and complaint events in real time — wire Pulse into your own product.

  • AI mailbox creator

    Generate realistic sender identities — names, addresses and signatures — and provision mailboxes across domains in seconds.

How it works

From a bare server to live sending, guided the whole way.

  1. 01

    Deploy

    One setup wizard stands up your Pulse instance on your own server — no manual config.

  2. 02

    Add a client

    Pick or buy domains; DNS, certificates and reverse DNS are configured automatically.

  3. 03

    Create mailboxes

    Generate inboxes with AI identities, assign isolated IPs, and start automated warm-up.

  4. 04

    Send & monitor

    Connect any sequencer or the API, then watch deliverability and rotate IPs as needed.

Why self-host

Your IPs. Your domains. Your data.

Pulse runs on infrastructure you control, so sending reputation and customer data never pass through a shared third-party pool. Licensed per instance, with separate stable and early-access update channels.

  • ✓Full control of IP reputation
  • ✓Customer data stays on your servers
  • ✓Scale IPs and domains without per-seat fees
  • ✓Guided updates on stable or early-access
Get started

Launch your own cold-email infrastructure.

Pulse is in limited early access. Tell us about your sending volume and we'll get you set up.

Sending volume (optional)

One email when Pulse opens. Nothing else, and no sharing — which would be an odd way to run a deliverability company.

Explore features

Pulse by MailVitals. Self-hosted email sending infrastructure.