Email infrastructure & warmup

Cold email is the workhorse of B2B lead gen — but only if it lands in the inbox. B2B volume (hundreds of emails a day across clients) requires real sending infrastructure. Get this right and everything works; get it wrong and your campaigns die in spam.

Never send from your main domain

Cold outreach can hurt a domain's reputation. Keep your primary domain clean (your website/brand) and send cold email from secondary domains. If a sending domain gets flagged, your brand is safe.

The setup

• Buy 1–3 secondary domains — variations of your brand (yourbrand.co, get-yourbrand.com, tryyourbrand.com).
• Create 2–3 inboxes per domain via Google Workspace or Microsoft 365.
• Authenticate each: set up SPF, DKIM and DMARC DNS records. These prove your mail is legitimate and dramatically improve inbox placement.
• Warm up every inbox for ~1–2 weeks before real sending (warmup tools auto-send/reply small volumes to build trust). Start this on day one.

Volume & safety rules

• Cap each inbox at a modest daily volume (e.g. ~20–40 cold emails/day). To scale, add inboxes — never blast one.
• Only email verified addresses — guessed ones bounce and wreck reputation (this is why Scrupp verifies emails in Module 4).
• Keep bounce rate low — remove bounces immediately.
• Always offer an easy opt-out and honor it (it's also the law).

The math of scaling

Inboxes are your throughput. 6 inboxes × 30 emails/day = ~180 sends/day = thousands of prospects a month per client. You scale by adding inboxes and domains, not by overloading existing ones.

Order of operations: buy secondary domains → create inboxes → add SPF/DKIM/DMARC → warm up → only then start outreach. The warmup clock is why you set this up in week 1.

Next: a simple offer page and booking link so interested prospects and clients can act in one click.