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.

How many domains do I need for 30k emails per month?

Typically 6-10 dedicated outbound domains with 2-4 mailboxes each. The exact number depends on your daily sending caps, ICP segmentation, and risk tolerance. We design the specific topology for your situation.

Playbooks30k / month

Cold email infrastructure for 30k emails per month

You've validated outbound at lower volumes. Now you need infrastructure that can reliably handle 30,000 emails per month without reputation risk.

Who this is for

Teams that have proven outbound works at 10k/month and want to scale to 30k while maintaining deliverability.

Typical sending volume

Around 30,000 cold emails per month across 3-6 ICPs or segments.

Common challenges

Infrastructure that worked at 10k starts breaking at 30k — domains get flagged, reply rates drop.
Not sure how many more domains and mailboxes to add without over-investing.
Need to maintain multiple ICP segments without cross-contaminating domain reputation.
Scaling fast enough for growth targets but not so fast that deliverability falls apart.

What we cover

Domain pool expansion plan with clear cadence for adding and rotating domains.
Per-segment mailbox allocation to isolate reputation risk.
Volume ramp playbooks that protect existing healthy domains while adding new ones.
Monitoring dashboards that flag issues before they compound.

Infrastructure blueprint

Expand to 6-10 domains dedicated to cold outbound, segmented by ICP or vertical.
Allocate 2-4 mailboxes per domain with safe daily sending caps.
Implement automated monitoring with alerts for blacklist hits, bounce spikes, and placement drops.
Build a warmup pipeline so replacement domains are always 2-3 weeks from ready.

Success metrics

Playbook

Consistent inbox placement across all domain groups at 30k volume.
No more than 1 domain flagged per quarter (vs. 2-3 at lower, unstructured volumes).
Clear per-segment performance metrics isolating infrastructure from content variables.

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