New rules for bulk email senders from Google, Yahoo: What you need to know

New rules for bulk email senders from Google, Yahoo: What you need to know


We’ve updated our story on bulk email restrictions to include the news that Cox.net email addresses are now being managed by Yahoo.

On Feb. 1, 2024, Google and Yahoo started enforcing new requirements for bulk email senders. The guidelines largely focus on three areas: authentication of outgoing emails, reported spam rates and the ability to easily unsubscribe from email lists.

Google defined bulk senders in an early-October 2023 announcement as “those who send more than 5,000 messages to Gmail addresses in one day,” which caught the attention of email marketers in both B2B and B2C circles.

Bulk senders that fail to meet the sender requirements will get temporary errors (with error codes) on a small percentage of their non-compliant email traffic, according to Google. These temporary errors will help senders identify email traffic that doesn’t meet the new guidelines and give senders an opportunity to resolve issues leading to non-compliance.

Email rejections began in April 2024. According to Google:

In April 2024, we’ll start rejecting a percentage of non-compliant email traffic, and we’ll gradually increase the rejection rate. For example, if 75% of a sender’s traffic meets our requirements, we’ll start rejecting a percentage of the remaining 25% of traffic that isn’t compliant.

Google email sender guidelines

What are the email authentication requirements for bulk senders?

The two companies require bulk email senders to use what Google calls “well-established best practices” to authenticate the sender. This will close loopholes that can be exploited by attackers, according to Google. 

When it comes to email authentication, three mechanisms work together:

  • Sender Policy Framework (SPF) helps prevent domain spoofing by allowing senders to identify the email servers that are allowed to send emails from their domain.
  • DomainKeys Identified Mail (DKIM) adds a digital signature to outgoing email, which verifies the message was sent by an authorized sender and wasn’t tampered with along the way. 
  • Domain-based Message Authentication, Reporting and Conformance (DMARC) helps domain owners specify which actions to take when an email fails authentication. It also enables reporting on email authentication results.

Google and Yahoo now require bulk senders to set up all three of these mechanisms. 

What are the reported spam rates for bulk email senders?

Google says bulk senders must keep their reported spam rate (i.e., the percentage of outgoing messages reported as spam by recipients) in Google Postmaster Tools below 0.10% and “avoid ever reaching 0.30% or higher.”

Reporting an email as spam is relatively easy, which sets this requirement apart from authentication and unsubscribe links. It comes down to the value the receiver thinks they get. To some extent, it’s out of the hands of the sender.

Dana Carr, director of email marketing for customer data platform vendor Optimove, recommends a couple of strategies to avoid having legitimate messages flagged as spam. First, pay attention to send times. Many bulk emails are sent at the top or bottom of the hour, which makes it easy for people to report them as spam altogether. 

She also suggests using preference centers, which let users dictate the frequency of emails, as well as the categories and products included in the messages. Preference centers not only reduce email volume, but they often increase engagement with emails, Carr said. 

What are the ‘unsubscribe’ requirements for bulk senders?

Unsurprisingly, Google is requiring marketing messages and other subscribed messages to support one-click unsubscribe functions. 

This should already be table stakes for experienced email marketers, Carr said. Any lingering reluctance to include the feature is a sign of an email strategy focused on quantity over quality. 

“The number of people receiving your emails is one number in a group of numbers that can hurt your reputation. That includes not only list size, but open rates,“ Carr said. “At the end of the day, all of these numbers are hurting your engagement metrics. Instead of thinking about list size, we need to think about segmentation and targeted content.”

Dig deeper: Email marketers may be hit by Google mass account removal

How concerned should email marketers be about these requirements?

Most experienced email marketers will look at these requirements and say, “Check. Check. Check.”

Carr believes senders who understand authentication and good email practices shouldn’t be overly concerned. But there’s a catch. 

The requirements apply at the domain level, which means they apply to all of the emails sent by the organization using the domain, not just marketing. That includes sales teams, particularly, business development representatives and sales development representatives that often rely heavily on outbound cold email tactics. 

Armed with generative AI tools and sales engagement platforms (e.g., Salesloft and Outreach), these teams are capable of generating a high volume of email. 

These roles don’t always report to marketing, either, and likely aren’t familiar with email authentication requirements. That sets up a turf battle of sorts for marketers trying to protect their email strategy. 

“It is generally marketing that controls the authentication,” said Ryan Phelan CEO and co-founder of digital marketing services company RPEOrigin.com and a MarTech contributor. “This is where a good partnership between sales and marketing is critical.”

Carr also thinks marketing should take the lead on authentication and good email practices throughout the organization. “Marketing should be aware of the sending domain for messages,” she said. “Some people will get this confused with the website domain.”

Marketing should also be advising the team managing the authentication, Carr said, because any change at the DNS level could cause a serious problem.

Dig deeper: 3 keys for email marketing in 2024: AI, change, learn

Why are there new requirements for bulk senders?

Spam is a significant problem. Most people don’t realize the breadth of the issue because the vast majority of spam messages are blocked before they reach the inbox. Spam is also a security threat, and when it reaches the inboxes of users in certain corporations or government agencies, it’s potentially a very serious security threat. 

But ridding the world of spam is only part of the motivation here. 

“The inbox is a revenue source,” said Phelan. “The ads at the top of the inbox. The ads in the mobile app. It’s a hook into the data mart for Google.”

Google has, for years, taken steps to protect its revenue source, including adding tabs to sort out promotional and social emails in Gmail. Phelan believes the latest moves are another way to address the problem. The natural reaction, he said, is to filter out the noise by using tactics like authentication to help decide who reaches the inbox. 

Carr agrees that the move has a lot to do with keeping the inbox central to people’s daily activities. “[Google is] not foolish,” she said. “They know more and more customers are choosing other channels, including SMS and in-app messaging. This is like parents saying, ‘I gave you three chances.’”

Study finds B2B firms aren’t prepared for bulk email restrictions

Companies in the B2B sector, where outbound email is an important part of the sales strategy, will have to learn to live with these bulk email restrictions. 

A report from Customers.ai, which sells tools to help businesses better identify their website visitors, suggest many B2B sectors are experiencing reported spam rates far above the level of 0.1% suggested by Google and Yahoo and even surpassing the 0.3% threshold that senders should never reach. 

The average spam complaint rate across the B2B space was 2.01%, with a range between 1.1% and 3.1%.

In fact, for the nine spammiest verticals identified by Customers.ai, the company was unable to find a single sender that was able to score below the 0.3% threshold. Learn more about the Customers.ai study and its methodology on the company’s blog.

Spam complaint rates by industry.
Source: Customers.ai.

What about Google Workspace inboxes?

But there’s good news for B2B bulk email senders. If they’re sending to business email accounts running on Google, there’s an exemption.

Google Workspace inboxes are email accounts managed by businesses or educational institutions that reside on Google servers. While it was initially unclear whether the bulk email restrictions would apply to Google Workspace accounts, Google eventually confirmed they did not.

The Email sender guidelines don’t apply to messages sent to Google Workspace accounts. Sender requirements and Google enforcement apply only when sending email to personal Gmail accounts.

Google email sender guidelines

A multichannel approach will help protect your email

Outbound sales teams in the B2B sector are getting much of the attention around the new bulk email restrictions. Unlike marketing, cold sales outreach in B2B relies mainly on two channels: email and phone calls.

“On the B2B side, this all traces back to the money,” said Phelan. “Cold email has become so prevalent in the toolbox, everyone is using it.”

While marketers in some organizations might prefer that sales teams dial down their email outreach, the reality is that it’s easier than ever to send a high volume of cold emails.

Phelan prefers marketers take the lead on outreach with account-based marketing (ABM) campaigns. A multichannel approach to ABM will expose prospects to messages in display ads and on social media, for example, in addition to email. The downside of the ABM approach? It takes a lot more work to plan and build than email.

Natalie Jackson is Director of Demand Generation at CBIZ, co-host of the podcast Humans of Email and a MarTech contributor. She agrees that a multichannel approach will not only keep marketing organizations from running afoul of new bulk sender restrictions, but will also deliver more insights about marketing channels and revenue streams. That includes putting marketing in a position to see how sales outreach compares to other channels.

“These changes are 100% an opportunity for marketers to have a bigger hand in the customer journey and prospect experience,” Jackson said. “Email can’t live in a silo. You see this in email engagement reports. If you’re only looking at a sent email report, you’re missing the bigger picture of what interactions are influencing recipient behavior. What’s the impact of one-to-one interactions? Sales engagement tools? Social media? Website? Advertising?”

A holistic view of outreach and results will allow marketers to protect their email domains and better judge the performance of different channels and tactics.

“If we, as marketers, don’t have insight into these interactions, we’re limiting our ability to influence revenue streams,” Jackson said. “We need visibility into other sending systems, yes, but for reasons beyond deliverability.”

Microsoft Exchange Online introduces External Recipient Rate limit

Microsoft announced in April 2024 it would begin enforcing an External Recipient Rate (ERR) limit of 2,000 recipients in 24 hours in January 2025.

The goal of the ERR is to reduce abuse and unfair usage of Exchange Online resource, according to Microsoft. Exchange Online was not designed to support bulk or high-volume transactional email, but Microsoft has not enforced limits on bulk email until now.

Currently, Exchange Online enforces a Recipient Rate limit of 10,000 recipients. The new 2,000-message ERR limit will become a sub-limit within the 10,000 Recipient Rate limit. Users who send to less than 2,000 external recipients in a 24 hour period, will still be able to send to 10,000 total recipients.  

The new ERR limit will be introduced in two phases:

  • Phase 1: Starting Jan. 1, 2025, the limit will apply to cloud-hosted mailboxes of all newly created tenants.
  • Phase 2: Between July and December 2025, Microsoft will start applying the limit to cloud-hosted mailboxes of existing tenants.

Microsoft is advising users with bulk email needs for cloud-hosted mailboxes to switch from Exchange Online to Azure Communications Services for Email.

Yahoo introduces new, improved Sender Hub Dashboard

Yahoo introduced a new Sender Hub Dashboard in May of 2024 to give email senders more visibility into their email activity.

Email senders can use the new hub to enroll in Complaint Feedback Loop (CFL) management. Enrolled senders will receive a report when recipients mark their emails as spam, allow them to optimize their target audience and email frequency.

The Sender Hub Dashboard also features information on AMP, Email Structured Data and Schema and Brand Indicators for Message Identification (BIMI). Email senders can use the Hub to access deliverability information as well, including Yahoo sender requirements and recommendations on how to send emails to Yahoo users and error code explanations for senders who encounter issues or SMTP errors.

Bulk email restrictions change subscriber acquisition and list management

New subscribers are among the riskiest segment of your email list. In his article on list management and acquisition post-Gmail bulk email restrictions, MarTech contributor Brian McKenna suggests two initiatives for he recommends brands use with new subscribers.

  • Set (or tighten) standards for when to remove people from ongoing sends.  By identifying both early engagers and non-engagers, marketers are able to relegate the latter into a slow warm-up campaign faster than they would have before the bulk email restriction were put in place.
  • Set up stronger automations based on user engagement. Automations are key for moving new subscribers definitively into an engaged segment. Setting up automations based on types of engagement helps increase the value of the messages you’re sending to your new users. The larger your list of engaged users gets, the more often you can send them messages — and the more latitude you have to drive new customer acquisition.

Google did not kill open tracking and pixels

In late August and early September 2024, rumors started spreading on LinkedIn that Google killed open tracking by blocking images — including pixels — in emails.

Open tracking (i.e., the ability for marketers to track who opened an email) is increasingly referred to as a vanity or unreliable metric because a number of things impact the accurate. Apple’s Mail Privacy Protection (MPP) was the most significant blow to tracking email opens.

When images were posted on LinkedIn showing emails with the images blocked, some LinkedIn users took it to mean Google was putting an end to the use of images to track opens (such as they can be tracked).

In truth, Google’s Gmail for years blocked images (including pixels) as a safety precaution in emails it labeled as spam.

If your mail ends up being detected as spam, the images will indeed be blocked by Gmail. For marketers emailing customers and prospects with permission, nothing changed on Google’s end.

By the first week of September, email deliverability experts on LinkedIn were dispelling the rumors, including Travis Hazlewood, head of deliverability at Ortto, and Valimail’s Al Iverson. Hazlewood even had some fun with the whole kerfuffle.

Gmail did not kill open tracking.

Cox.net joins long list of email domains managed by Yahoo

Email addresses for customers of Cox, one of the largest consumer broad providers in the U.S., are now being managed by Yahoo. According to Spam Resource Center, the change took effect at some point in October 2024.

The advice for email senders is to treat Cox.net email addresses the same way you treat other mailboxes managed by Yahoo, which means paying close attention to the requirements discussed above.

The Cox.net email domain is far from alone in being managed by Yahoo. In addition to yahoo.com and Yahoo domains in other countries, such as France, Germany, Brazil and the U.K., the company manages email for aol.com, netscape.com, frontier.net, rogers.com, sky.com and verizon.net, among others.

Email:


The post New rules for bulk email senders from Google, Yahoo: What you need to know appeared first on MarTech.



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