The fastest way to wreck your company's email — the domain your invoices and customer replies go through — is to blast cold outreach from it. Sending infrastructure exists to keep your outreach and your business mail completely separate, and to give your cold sends a reputation of their own.
Rule one: a dedicated sending domain
Cold email goes out from a separate domain, never your primary. If a cold campaign ever draws complaints, your real mail — the stuff you can't afford to lose — is insulated. Lead Loop always sends from a dedicated domain, never a primary mail domain.
Rule two: authenticate it fully
SPF, DKIM, and DMARC on the sending domain, properly aligned. This is what lets receiving servers trust the mail is really yours — the foundation of deliverability.
Rule three: warm it up
A new domain has no reputation. Warmup builds one by starting with a trickle of sends and ramping volume gradually over weeks, so the domain looks like a normal human sender rather than a machine that appeared overnight and started blasting.
Rule four: throttle forever, not just at the start
Warmup isn't a phase you finish; a daily send cap stays in place permanently and rises only as reputation supports it. Steady, predictable volume is what filters reward.
How Lead Loop handles it
The sending infrastructure — dedicated warmed domain, authentication, throttle, suppression before every send — is set up and operated as part of the build. You never touch a DNS record; you just watch replies come in.