Under the CAN-SPAM Act, welcome series emails almost always require an unsubscribe link if their primary purpose is commercial. This includes messages designed to introduce products, services, special offers, or even to simply build brand awareness with a marketing objective. The critical distinction lies in the 'primary purpose test': if an email promotes or advertises, it is commercial and must offer a clear, conspicuous way for recipients to opt out of future communications. Purely transactional welcome emails, such as a confirmation that an account has been created without any additional marketing content, are generally exempt. Email Service Providers largely adhere to this interpretation, often requiring an opt-out mechanism for any content not strictly defined as transactional, further underscoring the importance of including unsubscribe links in most welcome series.
9 marketer opinions
When assessing welcome series emails for CAN-SPAM compliance, the inclusion of an unsubscribe link hinges on the email's predominant objective. If a welcome message, even one simply introducing a brand, includes any promotional content, offers, or aims to drive engagement with a marketing goal, it is classified as a commercial email. This designation immediately triggers the legal requirement for a clear, functional unsubscribe mechanism. Conversely, only purely transactional welcome emails-such as a simple account activation or subscription confirmation devoid of marketing elements-may be exempt from this rule. The general consensus among industry experts and the common practices of Email Service Providers underscore that most welcome series, by their very nature of onboarding and relationship-building, typically fall under the commercial umbrella and therefore mandate an opt-out option.
Marketer view
Marketer from Email Geeks explains that the interpretation of "transactional" versus "marketing" emails can also depend on the Email Service Provider (ESP), as many systems require an opt-out link for anything not strictly defined as transactional.
4 Jul 2023 - Email Geeks
Marketer view
Marketer from HubSpot Blog explains that generally, if a welcome email contains any promotional content, it's considered a commercial email under CAN-SPAM and must have an unsubscribe link. The primary purpose test determines if an email is commercial or transactional.
7 Nov 2021 - HubSpot Blog
5 expert opinions
The necessity of including an unsubscribe link in welcome series emails is a common question, and the answer hinges on the email's predominant objective as defined by the CAN-SPAM Act. If a welcome message serves any commercial or promotional purpose, such as introducing products, services, or brand value, it is legally obligated to provide a clear and conspicuous opt-out mechanism. This applies even if the marketing content is subtle. Only welcome emails that are strictly transactional, like an account activation confirmation without any additional marketing content, may be exempt. Industry experts and Email Service Providers consistently advise that most welcome series, by their very nature of onboarding and engaging new subscribers, fall under the commercial classification, thus requiring an accessible unsubscribe option.
Expert view
Expert from Email Geeks explains that every commercial email needs an unsubscribe link unless it's strictly transactional, as defined by CAN-SPAM. She elaborates on what constitutes transactional content versus commercial content based on primary purpose. She also states that all commercial emails are required to have a physical postal address, though she notes it can be a gray area and FTC prosecution is unlikely, but it's a bad idea to omit it.
28 Jan 2023 - Email Geeks
Expert view
Expert from Email Geeks shares insight into the motivation behind requests to remove unsubscribe links, suggesting that if people are unsubscribing, it indicates a problem with the email content, not the unsubscribe button itself.
4 Apr 2022 - Email Geeks
6 technical articles
For welcome series emails, the inclusion of an unsubscribe link is largely dictated by the CAN-SPAM Act, which mandates this for any message deemed 'commercial.' If a welcome email includes promotional content, introduces products or services, offers discounts, or aims to build brand engagement with a marketing purpose, it falls under the commercial category and therefore must provide a clear and easy-to-find opt-out mechanism. The exemption for transactional emails is quite narrow, applying only to messages like direct account confirmations or shipping updates that contain no marketing material whatsoever. Industry experts and Email Service Providers consistently advise that the vast majority of welcome series emails, by their nature of engaging and onboarding new subscribers, carry a commercial intent and must consequently include an unsubscribe option.
Technical article
Documentation from FTC.gov explains that under CAN-SPAM, all commercial email messages must include a clear and conspicuous way for recipients to opt out of getting future email from you. Welcome series emails, if they contain commercial content (e.g., promoting products/services), are considered commercial and thus require an unsubscribe link. Transactional emails, however, are exempt.
30 Oct 2023 - FTC.gov
Technical article
Documentation from Mailchimp Knowledge Base clarifies that all marketing emails, including welcome emails that promote products or services, are subject to CAN-SPAM and must include an unsubscribe link. Transactional emails, like order confirmations, are exempt.
1 Dec 2022 - Mailchimp Knowledge Base
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