Every term you'll encounter in B2B outreach, explained in plain English. 44 definitions with links to in-depth chapters.
Sending two variants of an email (different subject line, body, or CTA) to similar audience segments to determine which performs better. Statistical significance requires at least 200-500 recipients per variant. The winning version is then used for the remainder of the campaign.
Learn moreA database of IP addresses or domains identified as sources of spam. Being listed on a major blacklist (Spamhaus, Barracuda, SORBS) can cause your emails to be rejected by recipient servers. Regular monitoring and clean sending practices prevent blacklisting.
Learn moreThe percentage of sent emails that could not be delivered. Hard bounces are permanent failures (invalid address), while soft bounces are temporary (full inbox, server down). A bounce rate above 3% signals list quality issues and can damage sender reputation.
Learn moreThe Controlling the Assault of Non-Solicited Pornography And Marketing Act (2003) is a US law governing commercial email. It requires a physical mailing address, clear identification as an ad, and a working unsubscribe mechanism honored within 10 business days. Penalties can reach $51,744 per email.
Learn moreCanada's Anti-Spam Legislation is one of the strictest email laws globally. It requires express or implied consent before sending commercial electronic messages. Implied consent expires after 2 years of a business relationship. Penalties can reach $10M CAD per violation for businesses.
Learn moreA domain configured to accept emails sent to any address at that domain, even if the specific mailbox doesn't exist. These are risky for cold outreach because the email appears valid during verification but may not reach a real person. Treat catch-all addresses with caution.
Learn moreThe percentage of email recipients who clicked on one or more links in your email. In cold email, CTR is less important than reply rate since the goal is conversation, not clicks. However, it can indicate interest when used with content links or case studies.
Learn moreAn unsolicited email sent to a potential customer with whom you have no prior relationship. Unlike spam, cold email is targeted, personalized, relevant, and compliant with regulations. It is a legitimate B2B prospecting method when done correctly with proper research and value proposition.
Learn moreBranching rules in email sequences that trigger different follow-up paths based on recipient behavior. For example, sending a different follow-up to someone who opened but didn't reply versus someone who didn't open at all. Smart conditions dramatically improve relevance.
Learn moreSoftware that tracks all interactions with prospects and customers. For outreach, CRM integration ensures that email activity (opens, replies, meetings) is automatically logged, deals are created, and no prospect falls through the cracks. Popular options include HubSpot, Pipedrive, and Salesforce.
Learn moreThe ability of your emails to reach the recipient's inbox rather than being filtered to spam or rejected entirely. Deliverability depends on technical setup (SPF, DKIM, DMARC), sender reputation, content quality, and sending patterns. It is the foundation of any outreach program.
Learn moreAn email authentication protocol that adds a digital signature to outgoing emails. The receiving server verifies this signature against a public key in your DNS records, confirming the email wasn't altered in transit and actually came from your domain.
Learn moreA protocol that builds on SPF and DKIM to tell receiving servers what to do when authentication fails. DMARC policies range from 'none' (monitor only) to 'reject' (block unauthenticated mail). It also provides reporting so you can see who's sending email on behalf of your domain.
Learn moreThe internet's address book that translates domain names into IP addresses. For email, DNS records (MX, SPF, DKIM, DMARC) determine how your domain handles email routing and authentication. Proper DNS configuration is essential for deliverability.
Learn moreThe gradual process of building sending reputation for a new domain or email account. Start with 5-10 emails per day and increase by 10-20% daily over 2-4 weeks. Sending too much too fast from a new domain triggers spam filters and damages reputation.
Learn moreA series of automated emails sent on a predetermined schedule. Unlike dynamic sequences with conditional logic, drip campaigns follow a fixed timeline regardless of recipient behavior. They're simpler to set up but less responsive to engagement signals.
Learn moreA series of automated emails sent to a prospect over time, typically 4-7 emails spread across 2-4 weeks. Each email in the sequence adds new value, context, or angles. Well-built sequences can achieve reply rates 3-5x higher than single emails.
Learn moreThe process of gradually increasing email volume from a new account while generating positive engagement signals. Warm-up tools simulate real conversations by sending and replying to emails between accounts, building the reputation that mailbox providers use to determine inbox placement.
Learn moreThe EU's data protection law that governs how personal data is collected, processed, and stored. For B2B cold email, GDPR permits outreach under 'legitimate interest' but requires data minimization, clear opt-out mechanisms, and records of processing activities.
Learn moreA permanent email delivery failure, typically caused by an invalid or non-existent email address. Hard bounces should be immediately removed from your list. A hard bounce rate above 2% signals poor list quality and will damage sender reputation.
Learn moreA detailed description of the company and contact most likely to buy your product. ICPs include firmographic criteria (industry, size, revenue), technographic data (tools used), and behavioral signals (hiring, funding). A well-defined ICP is the foundation of targeted outreach.
Learn moreThe percentage of delivered emails that land in the primary inbox rather than spam, promotions, or other tabs. This is the truest measure of deliverability. An inbox placement rate below 80% indicates technical or reputation issues that need attention.
Learn moreThe practice of distributing outgoing emails across multiple email accounts to stay within safe sending limits per account. Instead of sending 200 emails from one account, you send 40 from five accounts. This protects individual account reputation and improves deliverability.
Learn moreObservable actions or events that suggest a prospect may be ready to buy. Examples include job changes, funding rounds, technology installations, hiring patterns, and content engagement. Outreach timed to intent signals achieves 2-3x higher reply rates.
Learn moreA methodology for ranking prospects based on their perceived value and likelihood to convert. Scores are based on fit (how closely they match your ICP) and behavior (email engagement, website visits, content downloads). Higher scores get prioritized for outreach and follow-up.
Learn moreOne of the six legal bases for processing personal data under GDPR. For B2B cold email, you can argue legitimate interest when your product or service is genuinely relevant to the recipient's professional role. Requires a documented Legitimate Interest Assessment (LIA).
Learn moreThe ongoing practice of maintaining clean, accurate email lists by removing invalid addresses, duplicates, unsubscribes, and unengaged contacts. Regular list cleaning (at least quarterly) reduces bounce rates, improves deliverability, and saves money on sending costs.
Learn moreA DNS record that specifies which mail server is responsible for receiving email for a domain. MX records are essential for email delivery — without them, emails sent to your domain have nowhere to go. They also help verify that a domain can receive email.
Learn moreThe percentage of delivered emails that were opened by recipients. Tracked via a tiny invisible pixel, open rates are increasingly unreliable due to Apple's Mail Privacy Protection and other privacy features that pre-fetch images. Use as a directional metric, not an absolute measure.
Learn moreThe mechanism by which a recipient indicates they no longer wish to receive emails from you. All cold emails must include a way to opt out. Opt-out requests must be honored promptly (within 10 days under CAN-SPAM, immediately is best practice). Also called unsubscribe.
Learn moreCustomizing email content beyond basic merge tags like first name. Effective personalization references specific company details, recent events, industry challenges, or role-specific pain points. Deep personalization can increase reply rates by 50-100% compared to generic messages.
Learn moreThe percentage of replies that express interest, ask questions, or agree to a meeting. This is the most important metric in cold outreach because it measures actual pipeline generation. A positive reply rate of 3-8% is considered good for cold campaigns.
Learn moreThe process of identifying and researching potential customers before reaching out. Includes defining your ICP, building target lists, finding contact information, and enriching data. Good prospecting is the difference between spray-and-pray and precision outreach.
Learn moreA sales team member focused on outbound prospecting and qualifying leads. SDRs typically manage the top of the funnel: identifying prospects, sending outreach, handling responses, and booking meetings for account executives. Also known as BDR (Business Development Representative).
Learn moreDividing your prospect list into smaller groups based on shared characteristics (industry, company size, role, behavior). Segmented campaigns allow for more relevant messaging and typically achieve 2-3x higher reply rates compared to one-size-fits-all campaigns.
Learn moreA score assigned to your sending domain and IP address by mailbox providers based on your email sending behavior. Factors include bounce rate, spam complaints, engagement rates, and sending volume. A poor sender reputation leads to emails being filtered to spam.
Learn moreA temporary email delivery failure caused by a full inbox, server downtime, or message size limits. Unlike hard bounces, soft bounces may resolve on their own. Most platforms retry soft bounces automatically. If an address soft bounces repeatedly, treat it as a hard bounce.
Learn moreA DNS-based email authentication protocol that specifies which servers are authorized to send email on behalf of your domain. The receiving server checks your SPF record to verify the sending server is permitted, helping prevent spoofing and improve deliverability.
Learn moreSoftware that analyzes incoming emails to determine whether they're legitimate or spam. Filters examine sender reputation, authentication records, content patterns, link quality, and recipient behavior. Modern spam filters use machine learning and get smarter over time.
Learn moreEmail addresses used by ISPs and anti-spam organizations to identify senders with poor list practices. Pristine traps are addresses that never belonged to real people. Recycled traps are abandoned addresses repurposed as traps. Hitting a spam trap severely damages sender reputation.
Learn moreA master list of email addresses that must never receive outreach. Includes people who opted out, bounced addresses, competitors, existing customers, and any other contacts you've committed not to email. Always check against your suppression list before sending.
Learn moreA tiny 1x1 transparent image embedded in an email that loads when the email is opened, signaling to the sender that the recipient viewed the message. Apple's Mail Privacy Protection (MPP) and other privacy features can pre-load these pixels, making open tracking less reliable.
Learn moreThe act of a recipient requesting to stop receiving emails. An unsubscribe link or clear opt-out instruction must be included in every cold email. Best practice is to honor unsubscribes immediately and add the address to your suppression list across all campaigns.
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