Master reference for sending emails that reach the inbox. Always load this skill first for any email-related task, it will orient you quickly and route you to the right sub-skill. Use it for: email sending setup, inbox placement, spam avoidance, domain reputation, email infrastructure, writing or reviewing email copy, diagnosing why emails go to spam, building email workflows, or advising on list management. If the task touches email in any way, start here before doing anything else.
Best practices for writing email content that avoids spam filters and gets read. Load this skill whenever writing or reviewing any email from scratch - content decisions affect deliverability just as much as authentication does. Use it for: composing subject lines, preview text, HTML email structure, body copy, CTAs, plain-text alternatives, image guidelines, link rules, or auditing an email for spam signals. Also load it when a user asks why a specific email feels spammy, what words to avoid, how to structure an HTML email, or how to write a CTA. Covers both transactional and marketing content.
Best practices for planning, writing, and sending marketing email campaigns. Load this skill for any marketing email task, a poorly planned campaign can damage domain reputation for months, while a well-executed one builds it. Use it for: drip sequences, broadcast campaigns, segmentation strategy, personalization, CTA design, send timing, frequency management, re-engagement campaigns, welcome sequences, onboarding flows, A/B testing, or unsubscribe UX. Also load it when someone asks how to improve campaign performance, reduce unsubscribe rates, or structure a sequence that converts without hurting deliverability.
Strategy and design guide for email automation sequences (drip campaigns, lifecycle emails, nurture flows). Load this skill when a user describes a business problem and needs help choosing the right automation type, or when they want to build a multi-step email sequence. Use it for: onboarding sequences, welcome flows, feature discovery drips, feedback and NPS collection, milestone and success emails, lead nurture drips, trial conversion sequences, post-purchase flows, churn prevention sequences, re-engagement drips, upsell or expansion sequences, event-triggered automations, or any time someone asks "what emails should I be sending?" Based on the user's described problem, this skill maps them to the right automation type and gives them a concrete sequence structure to implement.
Deep reference for email authentication: SPF, DKIM, DMARC, and BIMI. Always use this skill before advising on anything involving DNS records for email, even if the question seems simple: authentication failures are the most common hidden cause of deliverability problems. Use it when: setting up a new sending domain, debugging why emails go to spam, reviewing DNS records, diagnosing DMARC alignment issues, interpreting authentication headers, reading DMARC aggregate reports, or advising on key rotation. If someone asks "why is my email going to spam" and authentication hasn't been verified yet, load this skill first.
Legal and regulatory compliance for email sending: CAN-SPAM, GDPR, CASL, and consent flows. Always load this skill when the task involves sending to recipients in the US, EU, or Canada, the legal requirements differ significantly between jurisdictions and the penalties for violations are severe. Use it for: consent collection, unsubscribe flows, GDPR data subject requests, what must appear in email footers, data retention obligations, double opt-in design, or evaluating whether a specific email practice is legally permissible. When in doubt about whether something requires consent or an opt-out, load this skill before answering.
Best practices for maintaining healthy email contact lists. Load this skill whenever working with contact data, diagnosing bounce or complaint rate problems, or importing lists, poor list quality is a leading cause of deliverability failure and it is easy to damage a domain's reputation with a single bad send to a stale list. Use it for: email address validation, bounce classification and handling, building suppression lists, processing unsubscribes, sunsetting inactive contacts, re-engagement campaign design, list import procedures, spam trap avoidance, or diagnosing why bounce or complaint rates are high. Also load it when asked whether to delete or suppress a contact.
Reference for monitoring email deliverability and diagnosing inbox placement failures. Always load this skill when deliverability has dropped unexpectedly or when setting up a new sending domain, problems caught early are far easier to fix than reputation damage that has built up over weeks. Use it for: setting up Google Postmaster Tools or Microsoft SNDS, investigating why emails are going to spam, checking blacklist status, recovering from a spam complaint spike, reading postmaster data, interpreting bounce codes, or running a systematic diagnosis of a deliverability problem. Also load it when asked what monitoring to set up before a first send.