B2B Data & Email Deliverability Glossary
This glossary defines the terms behind B2B contact data and email deliverability in plain, honest language. A Catch-all email is an address whose domain accepts all mail, so it cannot be confirmed; Email verification is the layered check that produces a deliverability verdict; B2B data (sales intelligence) (sales intelligence) is the structured company-and-contact information that powers prospecting; and Data enrichment completes records you already have. Each term below links to a full definition with examples and FAQs.
A catch-all (or accept-all) email address belongs to a mail server configured to accept mail addressed to every possible username at the domain, so a verifier cannot confirm whether the specific mailbox actually exists — which is why an honest verdict labels it catch-all, never valid.
Email verification is the process of checking whether an email address is real and able to receive mail — using syntax checks, domain and MX record checks, and a controlled SMTP mailbox probe — to produce a deliverability verdict that protects your sender reputation before you hit send.
B2B data, often called sales intelligence, is structured information about businesses and the people who work at them — job titles, departments, seniority, company size, industry, location, and verified contact details — used to find, qualify, and reach the right buyers.
Data enrichment is the process of adding missing or updated attributes to records you already have — appending verified emails, job titles, company size, industry, or technographics to a list of names, companies, or domains — so each record becomes complete enough to act on.
Email deliverability is the likelihood that a sent message reaches the recipient's inbox rather than bouncing or landing in spam, driven by list quality, sender authentication (SPF, DKIM, DMARC), sending reputation, and recipient engagement.
Bounce rate is the percentage of sent emails that could not be delivered. Hard bounces are permanent failures (the address does not exist); soft bounces are temporary (mailbox full, server down, message too large).
Sender reputation is the trust score that inbox providers assign to your sending domain and IP based on your sending history — bounce rates, spam complaints, engagement, and authentication — and it directly determines whether your mail reaches the inbox.
Lead generation is the process of identifying and collecting contact information for potential customers who match your ideal customer profile, so a sales or marketing team can reach out and start a conversation.
An ideal customer profile (ICP) is a description of the company and buyer most likely to get value from your product — defined by attributes like industry, company size, region, and the buyer's role and seniority — used to focus prospecting on accounts that are actually a fit.
Buyer intent data signals that a company is actively researching a product category — derived from web research behaviour, technographics, or hiring and growth signals — so you can prioritise the accounts most likely to buy soon.
Technographics describe the technology stack a company uses — its CRM, marketing tools, cloud provider, payment systems, and other software — used to target accounts whose tooling implies a fit for your product.
Firmographics are the descriptive attributes of a company — industry, employee count, annual revenue, location, and founding year — the company-level equivalent of demographics for people, used to define the account side of an ideal customer profile.
SPF, DKIM, and DMARC are email authentication standards that let receiving servers confirm a message genuinely came from your domain — the baseline for inbox placement and protection against spoofing.
SMTP (Simple Mail Transfer Protocol) is the standard protocol for sending email between servers. Email verifiers use a controlled SMTP conversation to probe whether a mailbox will accept mail, without actually delivering a message.
Data hygiene is the ongoing practice of keeping a contact database accurate, de-duplicated, and current — removing invalid records, merging duplicates, standardising fields, and re-verifying emails so the data stays trustworthy.
Data appending is the targeted form of enrichment that adds one specific missing field to existing records — most often appending a verified email address or phone number to a list of names and companies.
Data segmentation is the practice of dividing a contact database into focused groups based on shared attributes — industry, seniority, region, company size, or behaviour — so each segment can receive relevant, tailored outreach.
Cold email is outreach sent to a business contact you have no prior relationship with, typically for sales or partnership purposes — legal in the major markets when it identifies the sender, stays truthful, and honours opt-outs.
The CAN-SPAM Act is the US law governing commercial email. It permits sending to business contacts on an opt-out basis, provided you identify yourself honestly, avoid deceptive subject lines, include a physical address, and honour unsubscribe requests promptly.
GDPR for B2B refers to how the EU/UK data-protection regulation applies to business contact data — generally allowing outreach on a legitimate-interest basis with clear notice and an easy opt-out, while still treating a named person's work details as personal data.
Data suppression is the practice of permanently excluding specific records — opted-out individuals, Do-Not-Sell requests, and known complainers — from all search results, exports, and API responses, so they are never served or contacted again.
Do Not Sell or Share is a consumer right under US state privacy laws (notably California's CCPA/CPRA) to direct a business to stop selling or sharing their personal information — a request that, once made, must be honoured by suppressing the individual across all channels.
An API key is a unique credential that authenticates programmatic requests to a service's REST API, letting applications and scripts search, reveal, and enrich contacts without a human logging in — drawing from the same credit balance as the app.
A REST API is a web interface that lets applications request and exchange data over standard HTTP methods, returning structured JSON — the programmatic way to search, reveal, look up, and enrich contacts from a data platform.
An MCP server implements the Model Context Protocol, exposing a platform's capabilities as tools that AI assistants and agents can call directly — so an assistant can search, reveal, and verify contacts as first-class actions rather than scraping a web page.
Why honest definitions matter in B2B data
Most glossaries exist to fill a page. This one exists because the definitions are load-bearing. The way a data provider defines "verified" decides whether your next campaign reaches inboxes or trains Gmail to route you to spam. When a tool quietly counts a Catch-all email as verified, the number on your dashboard looks bigger and your Bounce rate climbs three weeks later. The vocabulary is where the honesty lives.
We define terms the way a practitioner who has watched a sending domain get torched would define them. A catch-all is undetermined, not valid. Verification has a freshness date, not just a verdict. Enrichment respects suppression, or it isn't enrichment — it's contamination. These distinctions are the difference between data you can stand behind and data that quietly costs you the inbox.
The entries are grouped into four families below: email deliverability, B2B data and targeting, privacy and compliance, and the developer and AI-agent surface. You can read them in any order, but the deliverability terms are the ones that pay off fastest if you send cold email.
The email deliverability glossary
Deliverability is whether your message reaches the inbox at all. It's decided by list quality, authentication, and reputation long before your subject line is read. These terms explain the machinery — and why verifying a list at the moment of send is the single most controllable lever you have.
- Email verification — the layered check (syntax, domain, MX, SMTP probe) that produces a deliverability verdict with a freshness date.
- Catch-all email — an address on a domain that accepts everything, so the specific mailbox can't be confirmed. Never call it verified.
- Email deliverability — the likelihood a message reaches the inbox rather than bouncing or landing in spam.
- Bounce rate — the percentage of sends that fail; hard bounces are the fast track to a damaged reputation.
- Sender reputation — the trust score inbox providers assign your domain and IP, built slowly and lost quickly.
- SPF, DKIM, and DMARC — the authentication records that prove your mail really comes from your domain.
- SMTP — the protocol verifiers use to probe a mailbox without delivering a message.
- Cold email — outreach to contacts you have no prior relationship with, legal in the major markets with conditions.
The four verdicts, side by side
Half of these terms come back to one table. Real mail servers don't answer in binary, so an honest verdict has more than two values. Here is what each one means and how we treat it.
| Verdict | What it means | Deliverability | Charged on export? |
|---|---|---|---|
| Valid | Mailbox confirmed to accept mail | High | Yes |
| Catch-all | Domain accepts all addresses; mailbox unconfirmed | Uncertain | Optional — never as valid |
| Risky | Deliverable but elevated risk (role, temporary) | Variable | Optional |
| Invalid | Mailbox doesn't exist or is rejected | None | No — refunded |
The B2B data and targeting glossary
This family is about finding the right people before you ever email them. It starts with B2B data (sales intelligence) — the structured company-and-contact information sometimes called sales intelligence — and works through the attributes and methods used to turn a raw dataset into a targeted, reachable list.
- B2B data (sales intelligence) — firmographic and contact data used to find, qualify, and reach buyers.
- Lead generation — identifying and collecting contacts that match your ideal customer profile.
- Ideal customer profile (ICP) — the description of the company and buyer most likely to get value from your product.
- Firmographics — company-level attributes (industry, size, revenue, location) that define the account side of an ICP.
- Technographics — the tools a company uses, a strong fit signal for complementary or competing products.
- Buyer intent data — signals that an account is researching your category and may buy soon.
- Data enrichment — appending missing attributes to records you already have.
- Data appending — enrichment focused on a single high-value field, usually a verified email or phone.
- Data hygiene — keeping a database accurate, de-duplicated, and current.
- Data segmentation — dividing a database into focused groups for relevant outreach.
The privacy and compliance glossary
Using B2B data responsibly is what keeps the channel healthy. These terms cover the laws and the operational mechanism — suppression — that turns a privacy promise into something real. The short version: outreach is legal in the major markets with conditions, and anyone who opts out must disappear everywhere.
- CAN-SPAM Act — the US law governing commercial email; opt-out, with honesty and easy unsubscribe required.
- GDPR for B2B — how the EU/UK regulation applies to business contact data, usually via a legitimate-interest basis.
- Do Not Sell or Share — the US-state right to stop the sale or sharing of personal information.
- Data suppression — permanently excluding opted-out individuals from search, exports, enrichment, and the API.
We treat suppression as the load-bearing compliance feature. Opted-out records are never served in any channel or segment, the exclusion survives data refreshes, and global privacy signals are honoured. A privacy page that isn't backed by reliable suppression is just copy.
The developer and AI-agent glossary
The platform is built for software and agents as well as people. These terms cover the programmatic surface — an instant key, a REST API, and a Model Context Protocol server — all drawing from the same credits, the same verification guarantee, and the same never-expiring balance as the app.
- API key — the credential that authenticates programmatic requests; issued instantly on signup.
- REST API — the HTTP/JSON interface for search, reveal, lookup, and enrichment.
- MCP server (Model Context Protocol) — the Model Context Protocol server that exposes the platform as tools AI agents can call directly.
How to use this glossary with the product
Every definition here maps to something you can do in B2B Database Network. The firmographic and contact attributes are filters in search. The verdicts appear on every revealed email. Enrichment and appending run through the same credits as a list export. And the developer terms describe the API and MCP surface you get the moment you sign up. The glossary is the vocabulary; the product is the same ideas made operational.
If you read only one entry, make it catch-all email. It explains why two providers can show wildly different bounce rates on the "same" data, and why we label catch-alls honestly even though it makes our verified count smaller. The smaller, honest number is the one your sender reputation thanks you for.
Frequently asked questions
What is the most important term in this glossary?
Catch-all email. The single biggest reason a contact list bounces is that catch-all addresses get counted as verified when they cannot be confirmed. Understanding why a catch-all is undetermined — neither valid nor invalid — is the foundation for everything else here.
Is the data on B2B Database Network verified?
Every email carries a layered verdict (valid, catch-all, risky, or invalid) and a verified_at freshness date. Verification runs at export, invalid addresses are refunded automatically, and catch-alls are always labelled as catch-all — never sold as verified.
Is it legal to use B2B contact data for outreach?
In the major markets, yes, with rules on how you use it. US commercial email is opt-out under CAN-SPAM; EU/UK B2B outreach typically rests on a legitimate-interest basis under GDPR with clear notice and easy opt-out. See the CAN-SPAM, GDPR for B2B, and data suppression entries for detail.
How often does B2B contact data go stale?
Roughly 20–30% of B2B contact data decays each year as people change jobs and companies restructure. That is why freshness dates and regular re-verification or enrichment matter as much as the original verdict.
What is the difference between data enrichment and a list export?
An export builds a brand-new list from filters; enrichment completes records you already have by appending missing attributes like a verified email or job title. Both draw from the same verified dataset and the same credit model.