What is a cold email infrastructure partner?

A cold email infrastructure partner like port587 designs, builds, and operates the technical systems behind B2B outbound email: dedicated sending domains, mailbox setup, DNS authentication (SPF, DKIM, DMARC), warmup schedules, deliverability monitoring, and reputation management. The goal is to ensure cold emails reliably reach prospects' inboxes.

How much does cold email infrastructure cost?

Cold email infrastructure pricing varies by volume and complexity. port587 offers tiered plans based on sending volume, number of domains, and scope of management. Typical engagements range from foundational infrastructure setup to full done-for-you outbound operations including lead generation and campaign management.

How is port587 different from Apollo or Instantly?

Apollo and Instantly are software platforms you operate yourself. port587 is an infrastructure partner that builds and runs the underlying systems for you: domains, mailboxes, deliverability, lead sourcing, and campaign operations. You focus on strategy and closing; we handle the technical execution.

Do you also provide B2B lead data?

Yes. port587 operates a B2B SaaS leads database at data.587.agency with 100,000+ verified companies. You can search, filter, and export leads by industry, geography, company size, revenue, and funding stage. It is available as a self-serve product with pay-per-lead pricing.

What types of companies does port587 work with?

port587 primarily works with B2B SaaS companies, lead generation agencies, and outbound-focused teams. Our infrastructure and services are designed for teams that rely on cold email as a core pipeline channel and need reliable deliverability at scale.

Can I skip warmup if I use a warmup tool like Instantly or Warmbox?

Warmup tools help, but they're not enough on their own. You still need proper DNS setup, the right daily volume ramp, and independent inbox placement testing. A warmup tool is one part of the process, not the whole thing.

How long does domain warmup actually take?

Plan for 2-3 weeks minimum. Some sources claim 7 days, but in practice, domains that are rushed through warmup tend to have problems within the first month of real sending. Patience here saves you from domain burns later.

PlaybooksDomain Warmup Guide

How to warm up cold email domains

A step-by-step guide to warming up new domains so they're ready for cold outbound. Covers timelines, daily volume ramps, DNS setup, and the mistakes that ruin domains before they ever send a real email.

Who this is for

Anyone setting up new domains for cold email — founders, SDR managers, or ops leads doing it for the first time.

Typical sending volume

The warmup process is the same whether you're targeting 5k or 50k emails per month. The difference is how many domains you warm up in parallel.

Common challenges

Registered a new domain, started sending immediately, and it hit spam within days.
Used a warmup tool but still can't get above 30% open rates on real campaigns.
Don't know the right daily sending ramp or how long warmup should take.
Worried about wasting 3-4 weeks warming up a domain that might not work anyway.

What we cover

Complete DNS setup before any warmup activity begins.
A 14-21 day warmup schedule with conservative daily volume increases.
Inbox placement testing at key milestones during the warmup.
Clear 'ready to send' criteria so you know when a domain is safe for real campaigns.

Infrastructure blueprint

Day 0: Register domain, set up SPF, DKIM, DMARC, and create mailboxes.
Days 1-7: Send 10-30 warmup emails/day, gradually increasing. Mix of replies and opens.
Days 8-14: Increase to 50-100 warmup emails/day. Run first inbox placement test.
Days 15-21: Ramp to near-target daily caps. Run second placement test for confidence.
Day 21+: Begin real campaigns at conservative volume, monitoring closely for the first week.

Success metrics

Playbook

Inbox placement above 85% on seed tests before declaring domain ready.
Domain surviving first 2 weeks of real sending without reputation drops.
Warmup completion within 3 weeks consistently.

Want us to handle the setup? We'll build this infrastructure for you and hand it over production-ready.