What are promotional emails?

Last reviewed: October 5, 2026 · Markdown version

A promotional email is one whose main purpose is to sell you something: a sale, a new product, a discount code, a "you left this in your basket" reminder. Marketing email is the same thing seen from the sender's desk. Gmail files it in its own tab, which Google describes as "Deals, offers, and other promotional emails." (Organize your emails into categories, read 5 October 2026). United States law uses a stricter phrase: a commercial message is "any electronic mail message the primary purpose of which is the commercial advertisement or promotion of a commercial product or service" (CAN-SPAM Act: A Compliance Guide for Business, read 5 October 2026). Those two definitions do not always agree, and the gap explains most of the odd things that land in the tab.

The legal test is "primary purpose"

The Federal Trade Commission's guide splits what an email can contain into three kinds: commercial content, "Transactional or relationship content – which facilitates an already agreed-upon transaction or updates a customer about an ongoing transaction", and "Other content". A message made only of the second kind is exempt from most of the law. The guide lists five things that qualify, among them confirming a purchase you agreed to, giving "warranty, recall, safety, or security information" about something you bought, and regular account balance information. It then adds a warning to businesses: "the law views these categories narrowly." It also notes that "The law makes no exception for business-to-business email."

Mixed messages are where it gets interesting. The FTC's worked example is two emails from the same firm, both with the subject "Your Account Statement". One opens with the customer's order and payment details and ends with a single line about new products; the guide calls it "most likely a transactional or relationship message". The other opens with a summer sale and mentions the order only at the end, and is "most likely a commercial message" despite the subject line. What comes first, and what the subject line leads you to expect, decides it (the CAN-SPAM Act guide above).

What a US promotional email has to carry

For mail that is commercial under that test, the same guide lists requirements including "Identify the message as an ad", "Your message must include your valid physical postal address", and "a clear and conspicuous explanation of how the recipient can opt out of getting marketing email from you in the future." A sender may offer a menu of message types, "but you must include the option to stop all marketing messages from you." That is the reason the small print at the bottom of shop mail looks so similar from one brand to the next. The guide covers US law only; how quickly a sender has to act on an opt-out is on how email subscriptions work.

How Gmail decides what goes in Promotions

Gmail's sorting is its own, not the FTC's. Google says that with the Default inbox type "Gmail automatically sorts your emails" into Primary, Social, Promotions, Updates and Forums, and the categories page describes no legal test and no sender declaration behind that sort (Organize your emails into categories, read 5 October 2026). So a receipt can sit in Updates on one day and a sale from the same shop in Promotions the next. Three things from that page are worth knowing:

You can correct it. "If you find an email in the wrong category, you can move it. Over time, this helps Gmail learn your preferences".
A filter can fix a sender for good. Google lists a filter that "Directs their email to a specific category".
Promotions arrive quietly. Gmail's new-mail notifications cover "messages in the “Primary” category" only, so nothing in Promotions buzzes your phone.

Mail in Promotions is not spam. Spam is a separate folder with its own button, and mail from senders you never signed up with belongs there: stopping spam emails.

Getting fewer of them

Gmail puts an Unsubscribe link "Next to the sender's name" on list mail, though "some senders may require you to go to their website" (Unsubscribe from an email, read 5 October 2026). Leaving one list may not end a shop's mail, because it "might only unsubscribe you from a single mailing list from the sender". Gmail's Manage subscriptions screen goes wider: from there, Gmail "unsubscribes you from all active mailing lists related to the sender", and afterwards "any new emails from them go to your spam folder" (Manage your subscriptions in Gmail, read 5 October 2026). Google flags that this screen "is gradually rolling out and may not be available to you yet." Whether to leave a particular list at all is the question answered on is it OK to unsubscribe.

The ones already in your mailbox

Unsubscribing stops new mail and leaves the old pile where it is. Clearing the whole tab in one go is on deleting everything in Promotions. If you would rather keep two or three shops and lose the rest, Adinand Email Cleaner lists a Gmail mailbox by sender, so each shop's years of offers become one row you keep or send to Gmail's Trash, and its Unsubscribe acts only when you tap it. It works with Gmail and no other provider. Messages it clears sit in Trash, where Google keeps them recoverable "Up to 30 days after deletion" (Delete messages in Gmail, read 5 October 2026), so the storage they used "will free up after Trash clears", in the app's own wording, unless you empty Trash sooner.