B2B and B2C deliverability
A corporate mail gateway and a consumer mailbox provider are not the same recipient. They filter differently, tolerate different sending behavior, and give you different evidence when something goes wrong. InboxGenius works both — usually for the same client.
Corporate gateways, security stacks and small, high-value lists
Mail passes gateways, security products and organizational policy before it reaches a mailbox — each with its own rules and its own idea of what is suspicious.
A blocked domain may affect a handful of recipients and a very large amount of revenue — and the signal is easy to miss in aggregate reporting.
Fewer engagement signals and fewer feedback mechanisms mean diagnosis relies on response codes, authentication detail and careful testing.
Sending identity, authentication alignment and consistency matter more than volume history — and a single misconfigured source can undo all of it.
Mailbox providers, engagement signals and volume at scale
Consumer providers weigh how recipients behave. Inactive segments, tired creative and over-frequency show up in placement quickly.
Ramps, spikes and irregular patterns invite throttling. Deliverability at scale is as much about pacing as about content.
Consent quality, list hygiene, preference handling and unsubscribe behavior translate directly into reputation.
Global consumer sending meets regional providers with their own handling. What works in one market can quietly fail in another.
Where the operational work differs
| Consideration | B2B | B2C |
|---|---|---|
| Primary gatekeeper | Corporate gateways and security products | Consumer mailbox providers |
| Strongest signal | Authentication, sending identity and consistency | Recipient engagement and complaint behavior |
| Typical failure mode | Silent quarantine or organization-level block | Spam placement and progressive throttling |
| Diagnostic evidence | Response codes, headers, targeted testing | Placement patterns, feedback loops, cohort behavior |
| Escalation route | Recipient-side IT, security vendor, filtering provider | Postmaster teams at the receiving networks, where appropriate |
Most enterprises are doing both at once — and only measuring one.
If your consumer marketing and your business-critical B2B mail share domains, IPs or platforms, they share a reputation. We treat them as one environment with two very different sets of recipients.
Both audiences, one expert team.
Tell us who you send to and how it's split. We'll show you where the risk actually sits.