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Sending and campaigns CAN-SPAM, CASL, PECR and Other Marketing Email Laws: A Plain-Language Overview for SendersEmail law differs by country, and the strictest rule that applies to a recipient is the one that matters. This overview compares the US CAN-SPAM Act,… 9 Oct 2026 · 13 min readRead article → Sending and campaigns Importing an Existing Email List: Consent Evidence, Segmenting and Re-Permission CampaignsMoving an existing contact list to a new sending platform is the riskiest day in a sender history. This guide explains how to audit consent evidence … 7 Oct 2026 · 13 min readRead article → Sending and campaigns Lifecycle Email Automation: Welcome Series, Onboarding, Cart and Re-engagement Flows That Protect DeliverabilityAutomated flows are some of the best-performing mail you send and some of the easiest to get wrong. This guide covers trigger design, cadence and thr… 3 Oct 2026 · 12 min readRead article → Sending and campaigns Email Template Personalization Done Safely: Variables, Fallbacks, Escaping and LocalizationPersonalization is one of the easiest ways to make an email useful and one of the easiest ways to embarrass yourself. This guide covers merge variabl… 2 Oct 2026 · 16 min readRead article → Sending and campaigns Email Content and Spam Filters: How to Write and Build Messages That Reach the InboxSpam filters judge more than words. This guide explains what content signals matter, which common beliefs about spam trigger words are overstated, ho… 22 Sep 2026 · 7 min readRead article → Sending and campaigns HTML Email Accessibility, Dark Mode and Rendering Across Clients: A Practical GuideAn email that looks right in your design tool can fall apart in Outlook, turn unreadable in dark mode, get clipped in Gmail or show only empty boxes … 15 Sep 2026 · 16 min readRead article → Sending and campaigns Email List Hygiene: How to Clean, Sunset and Re-Engage Your SubscribersA healthy list is smaller than most senders expect. This guide explains what list hygiene covers, how to remove addresses that harm your reputation, … 4 Aug 2026 · 7 min readRead article → Sending and campaigns Email Validation Before Sending: Syntax, MX, Disposable, Role and Catch-All ChecksEmail validation checks addresses before you send, so fewer messages bounce and your reputation stays steady. This guide explains each check, how to … 21 Jul 2026 · 11 min readRead article → Sending and campaigns GDPR and Email: Consent, Records and Unsubscribes for SendersIf you email people in the European Economic Area or the United Kingdom, two sets of rules apply: data protection law (GDPR) and the separate rules o… 14 Jul 2026 · 5 min readRead article → Sending and campaigns Password Reset and One-Time Code Emails: Design for Speed, Safety and DeliverySign-in codes and reset links are the most time-sensitive and security-sensitive email you send. This guide covers delivery speed, code and link desi… 30 Jun 2026 · 6 min readRead article → Sending and campaigns Sign-Up Forms and Double Opt-In: Building an Email List That Stays HealthyThe quality of an email list is set at the sign-up form. This guide covers single and double opt-in, how to stop bots and typos, what to record as pr… 23 Jun 2026 · 6 min readRead article → Sending and campaigns One-Click Unsubscribe: How to Add the List-Unsubscribe Header (RFC 8058)One-click unsubscribe lets a recipient leave your list from the mail client with a single tap, and Gmail and Yahoo require it from bulk senders of ma… 27 Apr 2026 · 6 min readRead article →

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