60 terms, defined the way we actually use them running outbound for B2B clients. No fluff definitions; where our doctrine has an opinion, the definition carries it.
A B C D E F G H I K L M N O P Q R S T V
An A/B test in cold email runs multiple copy variants against the same list at comparable volume, changing one variable at a time so the result is readable. Judge on interested replies per send, never raw replies, and make no calls before roughly 1,000 sends per variant. Below that floor, a difference is noise. Read more.
An AI SDR is software that automates parts or all of the SDR role: research, drafting, sending, reply triage. The category is real and the hype is not. AI drafting a thousand mediocre personalised emails is still a mediocre campaign at scale. The offer, the list, and the system still decide everything. Read more.
A blocklist is a shared register of domains and IPs flagged for spammy behaviour, maintained by operators like Spamhaus and consulted by mailbox providers on delivery decisions. Landing on one craters deliverability across every campaign at once. Sustained hard bounces and spam trap hits are the fastest routes onto one. Read more.
Booking rate is the share of interested replies that convert into a booked meeting. It measures everything downstream of the email: reply handling speed, the booking ask, calendar friction. A strong campaign with a weak booking rate is losing money after the hard part is already done, so track it separately from reply metrics. Read more.
Bounce rate is the percentage of sent emails that could not be delivered. In cold email it is a trend metric: a single-day spike is noise, because dead addresses bounce once and get suppressed. Act only on a rate sustained above roughly 6 percent across two or more days, and diagnose before touching anything. Read more.
A built-for-you offer is free work done before the prospect asks: a sample of the actual service, already made for their company, handed over in the email. We just built X for {COMPANY} is the shape. Scope it to a tight, cost-capped slice that proves the whole offer, or a wave of yeses will bury you. Read more.
A campaign is one list of leads receiving one sequence from one set of senders inside a sending platform. We run one campaign per list, with every copy variant competing in the same step against an identical audience. It is the unit at which cold email gets launched, measured, and killed. Read more.
A catch-all domain is one whose mail server accepts every address at the handshake, real or not, then bounces the dead ones later. No verifier can confirm individual mailboxes on these domains, which is why they come back labelled valid-risky. Treat them as a calculated bet: a separate send pool, never mixed into the clean list. Read more.
Cold email is outbound email sent to a prospect who has never heard of you, with no prior relationship or opt-in. Done properly it is one-to-one, plain text, and gives value before asking for anything. It is a demand generation channel: you are creating the want, not capturing it. Read more.
A composite champion is the email assembled from the winning elements of separate tests: the best subject, the best angle, the best CTA, each proven one variable at a time against a control. It is the end state of a disciplined testing cycle, and it becomes the new control the next round has to beat. Read more.
A CTA, or call to action, is the ask that closes an email. In cold email the right CTA is a pure interest check: a value question, or a reply trigger like reply yes and I will send it over. It never mentions calls, meetings, or time, because a cold stranger has received nothing worth paying time for yet. Read more.
Demand capture is harvesting buyers who are already searching: paid search, SEO, inbound. The prospect arrives with intent, so a direct meeting ask can stand. The classic outbound mistake is running demand capture tactics on a demand generation channel, asking a cold stranger for their calendar as if they had been looking for you. Read more.
Demand generation is creating want in buyers who were not looking for you, which is exactly what cold email does. The exchange runs one way: value flows to the prospect before any commitment flows back. That is why demand generation channels cannot borrow inbound's meeting-first playbook, and why book a call fails cold. Read more.
DKIM, or DomainKeys Identified Mail, is an authentication method that adds a cryptographic signature to every email you send, letting receiving servers verify the message genuinely came from your domain and was not altered in transit. It is table stakes: without DKIM, DMARC cannot pass, and volume senders get filtered. Read more.
DMARC is a DNS policy telling receiving mail servers what to do with email that fails SPF or DKIM checks: deliver it, quarantine it, or reject it. It sits on top of both and completes the authentication stack mailbox providers now demand of bulk senders. No DMARC record, no reliable inbox placement. Read more.
Email verification is checking each address with the receiving mail server before sending, so dead mailboxes get removed before they can bounce. Run it fresh on every scraped or built list, never trust stale validity flags, and shop on price, because verification is a commodity with a 50x price spread for identical accuracy. Read more.
Email warmup is building a new sender's reputation by starting at very low volume and raising it only as the mailbox proves itself. Our rule: every new sender starts at 1 email per day and scales to around 3 only once the campaign is producing real replies. Volume follows proof, never the other way round. Read more.
Enrichment is adding data to a bare lead record: the email address, the job title, the company size, the tech stack. It turns a list of company names into a sendable campaign. Waterfall enrichment runs multiple providers in sequence, paying the next one only when the last one missed, which keeps cost per found email down. Read more.
Firmographic data is the company-level equivalent of demographics: industry, headcount, revenue, location, funding stage. It is the backbone of B2B list building, because most ICPs are defined firmographically before anything else. The sharper the firmographic filter, the smaller and better the list, which is exactly the trade you want in cold email. Read more.
A follow-up is any email in the sequence after the first, sent to prospects who have not replied. Each one needs a new angle or fresh proof, never just bumping this to the top of your inbox, with at least three days between touches. Most replies come from follow-ups, not the opener. Read more.
GTM, or go-to-market, is the whole system by which a company reaches and converts its buyers: positioning, channels, sales motion, pricing, and the revenue operations wiring them together. Cold outbound is one GTM channel, and it works best when the offer and ICP decisions upstream of it were made properly first. Read more.
A hard bounce is a permanent delivery failure: the receiving server explicitly says the mailbox does not exist. Hard bounces are the ones that damage sender reputation when they pile up, because mailing dead addresses is the signature of a spammer with a scraped list. Verification before upload exists to prevent exactly this. Read more.
ICP, or ideal customer profile, is the precise definition of the companies and people your offer is for: industry, size, geography, role, and the situation that makes them buy. Every list gets built against it. A campaign aimed at the wrong ICP produces valid addresses, clean deliverability, and zero pipeline. Read more.
An intent signal is evidence a company may be in-market right now: hiring for a relevant role, raising funding, adopting a tool, researching a category. Intent-filtered lists let you email fewer people with sharper relevance. Treat signals as prioritisation, not proof: hiring an SDR is a clue, not a purchase order. Read more.
An interest check is a CTA that asks the prospect to evaluate whether an offer would be valuable, nothing more. No meeting request, no next step, no commitment. Its only job is to earn a reply that says yes, that sounds useful. Everything else happens inside the conversation that reply starts. Read more.
An interested reply is a response with genuine positive intent: a yes, a request for the thing you offered, or a real question about how it works. Also called a positive reply. It excludes auto-replies, referrals, and polite declines, and it is the metric that matters more than raw reply rate. Read more.
Interested reply rate is the share of total replies that are genuinely interested. It is the offer signal: 10 percent or more is good, 20 percent or more is great, below 5 percent means the offer is the problem, and zero at real volume means pause and rework. Judge campaigns on this, not raw replies. Read more.
The kill bar is the pre-agreed threshold at which an offer is declared dead: in our system, roughly 2,000 cumulative sends and around 20 replies with zero interested. Past the bar, continuing to send just burns list and sender reputation on a validated no. Set it before launch, not after feelings develop. Read more.
A lead list is the set of prospects a campaign will email, built against the ICP with names, companies, and verified addresses. Quality beats size every time: a big raw list is not a big usable list until it has been verified, MX-checked for hostile gateways, and sanity-checked for wrong-person signals. Read more.
A lead magnet is a valuable deliverable adjacent to your service, offered free to earn a reply: a case study breakdown, a benchmark, a plan. It is the furthest rung of the offer ladder that still ties to the service. The test: would the prospect pay 100 dollars for it? A thin templated PDF fails. Read more.
List decay is the steady rot of contact data as people change jobs and mailboxes get shut down. B2B data goes stale fast, which is why validity flags from a previous pass are worthless and every list needs fresh verification before sending. We once watched a list of previously valid addresses hit a 45 percent bounce rate. Read more.
A mail gateway is a security appliance, like Mimecast or Barracuda, sitting in front of a company's mailboxes and filtering inbound mail on policy. Strict gateways reject cold mail from unknown domains at close to 100 percent regardless of address validity, so we detect them by MX record and exclude them at list build. Read more.
A merge tag is a placeholder in email copy, such as {{FIRST_NAME}} or {{COMPANY}}, that the sending platform fills with each lead's data at send time. Merge tags are never spun and never altered, and every list gets checked for missing values first, because sending a literal {{FIRST_NAME}} to a prospect is unrecoverable. Read more.
An MX record is the DNS entry naming the server that receives a domain's email. In cold outbound it doubles as an early warning system: an MX lookup reveals when a domain sits behind a strict gateway like Mimecast, which rejects new senders on policy. We check every unique domain on every list, never a sample. Read more.
Nurture is the patient middle of outbound: staying usefully present with prospects who showed interest but did not book, and reactivating ones who went quiet. The rule is value on every touch, silence otherwise. A thinking prospect does not need chasing, and not now is a scheduling answer, not a rejection. Read more.
The offer is what you are actually proposing to the prospect and the terms attached: the service, the guarantee, the free asset, the entry price. It is the single biggest lever in cold email. When mail is landing and nobody is interested, the offer is the problem, and no amount of copy polish fixes it. Read more.
Open tracking is inserting a hidden pixel image into an email to record when it is opened. In cold email it is a bad trade: the pixel adds a marketing-mail fingerprint that hurts deliverability, and the data is unreliable anyway, since security scanners fire opens no human saw. We switch it off on every campaign. Read more.
An opt-out line is the sentence letting a prospect decline future emails, phrased as a reply request in cold email rather than an unsubscribe link, because links do not belong in cold copy. Every send carries one, and since it appears in every email, it gets the deepest spintax bank in the whole template. Read more.
Outbound is any go-to-market motion where you initiate contact with prospects rather than waiting for them to find you: cold email, cold calling, LinkedIn outreach. It trades the ready-made intent of inbound for control and volume. You choose exactly who hears about you, and exactly when they hear it. Read more.
Personalisation is tailoring an email to the recipient using their name, company, or situation. In cold email it is overrated as decoration and underrated as relevance: a genuinely relevant offer to the right list beats a clever first line about someone's LinkedIn post every time. Only use tokens that actually earn their place. Read more.
Pipeline is the total value of active sales conversations, from first interested reply through to close. It is the number outbound actually exists to move: reply rates and open rates are diagnostics, pipeline is output. A channel producing cheap replies but no pipeline is not working, whatever the dashboard says. Read more.
Plain text is email sent without HTML formatting, images, or styled signatures, the way a real person writes to one other person. Cold emails should be plain text, full stop, because HTML pattern-matches to marketing mail. The one exception is post-reply follow-up, where a clickable calendar link earns its HTML. Read more.
A PS line is the postscript after the sign-off, written lowercase as ps: in our house style. It is one of the most-read lines in any email, which makes it valuable real estate: a proof point, the opt-out courtesy, or a disarmingly human aside. One line, no second ask, never a link. Read more.
A qualified booking is a meeting with a prospect who actually matches the criteria the client sells to, checked against those criteria before it counts. It is the honest unit of outbound output: raw bookings flatter a campaign that is pulling the wrong people, and a no-show is not a booking at all. Read more.
Reply rate is total replies divided by emails sent, and it is a deliverability signal, nothing more. In our campaigns 0.5 to 1.0 percent confirms you are landing in the inbox, and above 1.5 percent is really good. It counts out-of-office and unsubscribes as replies, so never let it stand in for interested replies. Read more.
An SDR, or sales development representative, is the salesperson doing top-of-funnel prospecting: building lists, sending outbound, qualifying replies, booking meetings for closers. A fully loaded SDR costs far more than the salary suggests once tools, data, management, and ramp time are counted, which is the honest maths behind the agency comparison. Read more.
A secondary domain is a lookalike domain bought purely for cold sending, so outbound volume never touches the reputation of your main company domain. Register variants of your brand, set up SPF, DKIM and DMARC, warm them properly, and accept that they are burnable infrastructure while the primary domain stays clean. Read more.
Sender reputation is the score mailbox providers assign to your sending domain and IP based on bounces, complaints, engagement, and volume patterns. It decides whether mail lands in the inbox or the spam folder, and it compounds: a dirty list this month taxes every campaign next month. Guard it harder than the leads. Read more.
Sends per interested reply is the density metric behind every variant decision: total emails sent divided by interested replies produced. Under 500 is really good, 500 to 1,000 is good, over 1,000 is underperforming, and over 2,000 with zero interested means kill the variant. Lower is better, and it decides where volume goes. Read more.
A sequence is the ordered series of emails a campaign sends to each lead, where each individual email is a touch or step. Ours run a first email, follow-ups at least three days apart, then a new offer in a fresh thread around day 30. The sequence stops the moment a prospect replies. Read more.
Show rate is the percentage of booked meetings where the prospect actually turns up. A no-show is not a meeting, which is why we only count bookings with a confirmed show-up as real output. Reminders, short gaps between booking and call, and a genuine reason to attend are the levers that move it. Read more.
A soft bounce is a temporary delivery failure: a full mailbox, a server timeout, a greylisting delay. The address exists and the mail may deliver on retry. Soft bounces matter far less than hard bounces, but policy rejections from corporate gateways often hide among them, so read the bounce codes, not the headline count. Read more.
A spam trap is an email address that exists purely to catch senders with bad list hygiene. It never opted into anything, so any mail it receives proves the sender is blasting scraped or stale data, and hitting traps gets your domains blocklisted. Fresh verification and properly built lists are the only real protection. Read more.
SPF, or Sender Policy Framework, is a DNS record listing which mail servers are allowed to send email for your domain. Receiving providers check it on every send, and mail that fails looks forged. With DKIM and DMARC it forms the authentication baseline Google and Microsoft now require of volume senders. Read more.
Spintax is variant syntax, written as {option one|option two}, that makes each sent copy of an email unique. The platform picks one option per group per send, breaking the identical-body fingerprint filters use to spot bulk mail. The rule: every rendered combination must read naturally, and no option may ever change the meaning. Read more.
A subject line is the few words that decide whether a cold email gets opened. The winning register is lowercase, short, and internal-memo boring: quick question, ideas for {COMPANY}. Clever or salesy subject lines pattern-match to marketing mail. Word-scan every one against spam trigger words like free before anything ships. Read more.
TAM, or total addressable market, is the full universe of companies matching your ICP. In outbound it is a hard operational number: how many leads exist before the well runs dry. A small TAM changes everything, because you cannot burn a 3,000-company market on a weak offer and simply pull a fresh list next month. Read more.
Technographic data is information about the tools a company runs: their CRM, their sending platform, their cloud stack. It is one of the strongest targeting signals in B2B, because knowing a prospect uses a specific tool tells you which problems they have and which integrations, migrations, or competitor swaps they might actually buy. Read more.
A value question is our house CTA format: would that be useful? The question is the entire ask, with no separate request stapled on after it. It puts the prospect in the position of evaluating the offer rather than accepting a favour, which is exactly where you want a cold reader to sit. Read more.
A variant is one distinct version of an email competing inside a campaign, usually carrying a different offer, angle, or CTA. Run several against the same list, rank them on interested replies per send, and move volume to the winner. Not to be confused with spintax, which varies wording, never the message. Read more.