Email Marketing

Email marketing is the practice of using email to deliver content, offers, and updates to a defined audience, almost always with consent and a defined exit option. It includes:

• Newsletters: regular editorial content sent to a subscriber base.
• Lifecycle automation: triggered messages tied to user behaviour (onboarding, activation, expansion, win-back).
• Promotional broadcasts: time-bound announcements (product launches, events, offers).
• Transactional emails: messages tied to a specific user action (signup confirmation, password reset). Often regulatorily exempt from marketing rules but still part of the email footprint.

The regulatory environment shapes the channel. GDPR, CASL, CAN-SPAM, and equivalent laws define what consent is required and how. Modern best practice (double opt-in, prominent unsubscribe, clean lists) is built on those constraints.

A working B2B email program is built in five layers:

1. 1.List acquisition. Newsletter signups, gated content downloads, event registrations, free-trial signups. Quality of the entry point determines list quality downstream.
2. 2.Segmentation. Industry, role, lifecycle stage, behaviour. Programs that send the same message to the entire list waste relevance and burn the list faster.
3. 3.Automation. Lifecycle triggers for onboarding, activation, re-engagement, and win-back. Most B2B programs run 5 to 10 distinct automated sequences.
4. 4.Editorial. Newsletter or thought-leadership cadence. Adds brand value beyond direct conversion and keeps the audience opted-in between transactional messages.
5. 5.Measurement. Open rate, click-through rate, conversion, unsubscribe rate, list growth, deliverability metrics (bounce rate, spam complaint rate, sender reputation).

The biggest miss is treating email as a broadcast medium only. Programs that send a weekly newsletter to the entire list and nothing else underutilize the channel by 60 to 80%. The compounding value sits in segmentation and automation.

Reasonable B2B SaaS bands, mid-2020s:

• Open rate: 20 to 30% on healthy lists, 30 to 45% on highly engaged ones, under 15% suggests deliverability or list-quality problems.
• Click-through rate (CTR): 2 to 3% is typical, 3 to 5% is strong, under 1% suggests content or audience mismatch.
• Unsubscribe rate: under 0.3% per send is healthy, 0.5%+ signals over-mailing or poor targeting.
• Spam complaint rate: under 0.05% (one in 2,000) is the deliverability safe zone; above 0.1% triggers ISP penalties.
• List growth: 2 to 5% net per month is healthy on a maturing program; flat or negative growth signals an acquisition or unsubscribe problem.

Caveat: Apple's Mail Privacy Protection (rolled out in iOS 15) inflates open rates by triggering open events on opens that did not happen. CTR has become the more reliable engagement metric, and most B2B teams now report engagement-by-click rather than engagement-by-open.

Three patterns predictably damage email programs:

• Buying lists. Purchased lists produce low engagement, high spam-complaint rates, and damage sender reputation that takes months to repair. Even when permitted by regulation, the channel cost outweighs the short-term reach gain.
• Over-mailing. The most common cause of list decay. A program that escalates from one newsletter per month to three per week typically loses 20 to 30% of its engaged base over a quarter.
• Ignoring deliverability. Email that lands in the spam folder or the Promotions tab does not exist. Authenticate the sending domain (SPF, DKIM, DMARC), warm new sender domains gradually, and clean unengaged contacts before they damage sender reputation.

The healthiest practice is to think in cohort retention terms. A list that loses fewer engaged contacts than it adds compounds; a list that loses more decays. Track list health with the same rigour as customer retention.