You will be able to list the requirements Gmail and Yahoo introduced in 2024 for people sending large volumes of email.
For years, a business could send newsletters from a domain with no authentication at all, bury the unsubscribe link in grey text at the bottom, and still reach most inboxes. Plenty of small businesses did exactly that. Then two of the biggest inbox providers changed the rules, and senders who had never heard of DMARC found their mail going to spam.
In 2024, Google and Yahoo began enforcing new requirements for bulk senders: those who send large volumes of email to their users. Gmail and Yahoo Mail together hold a large share of personal inboxes, including many of your customers', so these requirements set the standard for everyone sending marketing email. This reading walks through what they ask for, what your email tool handles for you, and what is still your job.
Google defines a bulk sender by how much mail a domain sends to personal Gmail accounts in a day. Yahoo uses a similar idea. The exact thresholds are set out in each company's published guidelines, and they can change, so look them up rather than relying on a figure you have read elsewhere.
A small business with a few hundred subscribers may sit well below the threshold. That does not make the requirements optional in practice. Google applies a smaller set of rules to every sender, including authentication, and the bulk sender rules describe what good sending looks like for anyone. Your list will grow, and setting things up properly now is far easier than fixing them after a drop in delivery. Treat the bulk sender list as your checklist whatever your size.
The first requirement is authentication. Bulk senders must set up SPF and DKIM for their sending domain, and publish a DMARC record. The DMARC policy can be the monitoring level, p=none, which you met in lesson 3.2, SPF, DKIM and DMARC in plain words. The domain in the visible From address also has to line up with the domain that passes SPF or DKIM.
This is the requirement that rules out sending marketing email from a free Gmail or Yahoo address through a marketing tool. It is also why lesson 3.5 has you authenticate your own domain before you do anything else with your list.
There are some technical requirements about the sending servers too, such as encrypted connections and properly configured server records. If you send through a reputable email tool, the tool handles these for its own servers. It is worth a quick check in your tool's help pages that it says so.
The second requirement is about unsubscribing. Marketing and subscribed messages must support one-click unsubscribe. In practice that means a hidden instruction in the email's header which lets Gmail or Yahoo show their own unsubscribe button near the sender's name. The reader taps it once and is removed, with no login, no survey and no confirmation page. A clearly visible unsubscribe link in the body of the message is also expected.
Senders must also honour unsubscribe requests promptly. Google's guidelines state a time limit, so check the current figure.
Your email tool almost certainly adds the one-click header for you on marketing sends and processes the removal automatically. What can still go wrong is your own process. If you also keep contacts in a spreadsheet, a CRM or a shop platform, and someone imports them back into the tool later, you can undo an unsubscribe without meaning to. Lesson 1.2 covered this risk under consent. The inbox providers now watch for it too.
The third requirement is a low spam complaint rate. Every time a recipient presses report spam on your email, that counts against you. Google and Yahoo each publish a complaint rate that senders should stay below, and a higher one that leads to more serious consequences. Both figures are in their guidelines, and you should read them there.
Google's Postmaster Tools is a free service that shows how Gmail sees mail from your domain, including your spam complaint rate, once you send enough mail to Gmail users for it to show data. You verify your domain with it in much the same way as you set up the records in lesson 3.2. Your email tool's reports also show complaints, though they do not always capture every one.
The practical way to keep complaints low is everything earlier in this course. Email people who asked to hear from you. Tell them what they will get and how often. Deliver it. Make leaving easy, because a reader who cannot find the unsubscribe link reaches for the spam button instead.
Both companies publish their sender requirements and update them. Google's are in its email sender guidelines, part of the Gmail Help Center, with a companion FAQ. Yahoo publishes its sender best practices on its site for senders. Other inbox providers have their own expectations and may add requirements of their own.
Read Google's current page once, end to end. It takes about as long as this lesson, and you will come away knowing which items your tool covers and which ones are yours. In the activity below you will turn that page into a checklist and mark each requirement yes or no for your own setup.
Read Google's current email sender guidelines and write a checklist of each requirement with a yes or no for your own setup.
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