Email practices

An email reaches the inbox when the sending domain is authenticated (SPF, DKIM and DMARC aligned with the From: domain), the recipients asked for it, and the sender's spam complaint rate stays low; Gmail, Yahoo and Microsoft now reject or spam-filter mail that misses those rules, and authentication problems are the most common cause of mail in spam. The pipeline this skill follows runs from the email form through validation, double opt-in and recorded consent, a suppression check, an idempotent send with retries, and webhook events (delivered, bounced, complained) that feed the suppression list and hygiene jobs. For Resend's SDK, domains, contacts, broadcasts and inboxes read resend SKILL.md; for building templates read react-email SKILL.md. Sequence planning, lifecycle programs and campaign copy live in email-marketing; writing cold outreach is in cold-outreach SKILL.md, and only its law lives here.

Apply only the routes and checks for the selected job. Read a linked skill's named file from its installed folder when available, or from the linked source. Report an unavailable required reference instead of inventing it. [skill-authoring, DISTRIBUTION.md#composing-skills]

The rules