Wednesday, November 6, 2024

Why Some Emails Are Disappearing in Gmail: The Spam Filter Dilemma

Why Some Emails Are Disappearing in Gmail: The Spam Filter Dilemma

If you’ve noticed that some of your emails are mysteriously vanishing when sent to Gmail users, you’re not alone. A Google spokesperson recently shed light on this issue: Gmail's algorithms are flagging certain messages as spam. Let’s explore the background and implications of this situation.

Disappearing Emails: A Longstanding Issue

The phenomenon of emails disappearing isn’t new; it has sparked both frustration and relief over the years, depending on who you ask. Just three years ago, a company reported in the Gmail subreddit that several clients using a uk.com domain found their emails either blocked or marked as spam. Fast forward to May 2024, when another user lamented on Google’s support forums that emails from uk.com domains were being rejected due to low sender reputation.

My own inbox was graced with a message from a reader of PC Pro, a magazine I’ve contributed to for 30 years. They voiced the same concern: emails from uk.com domains were being blocked for Gmail users. After researching the issue, they noted that it was a well-documented problem. Frustrated, they were considering switching to a different domain just to ensure their emails would reach their intended recipients.

The Spam Filter: A Necessary Evil

For many Gmail users, having an effective spam filter is a welcome feature. While no spam filter is perfect—just look in your junk folder—Google has put considerable effort into striking the right balance between blocking unwanted emails and allowing legitimate messages through. Overall, it seems that Google is doing a commendable job with its Gmail protections.

Protecting Users from Spam and Malware

Recently, Google has implemented various strategies to combat spam, particularly with new requirements for senders who send a high volume of emails. Since April 2024, anyone sending more than 5,000 emails daily must adopt robust authentication methods and refrain from sending unsolicited messages. This move, while not the sole cause of the spam-related complaints, has certainly drawn attention to the issue.

Moreover, Google is leveraging advanced AI tools, specifically custom large language models, to enhance its spam detection capabilities. These models, trained on a vast array of spam and phishing content, have reportedly led to a 20% increase in spam blocking and a 90% improvement in response times to emerging threats.

Google’s Response to Complaints About uk.com Domains

In light of the recent complaints regarding emails from uk.com domains, I reached out to Google for clarification. Interestingly, the issues pertain to a commercial entity rather than the U.K.’s co.uk domain. A Google spokesperson explained that they have heightened protections against domains with a history of abuse. Many of these domains lack proper validation processes, making them appealing targets for spammers and malicious actors.

To summarize, Google emphasizes that the safety of its users is paramount. They encourage senders facing similar issues to complete a bulk sender escalation form, which allows for further investigation and hopefully a resolution that ensures Gmail recipients can receive their emails without hassle.


By keeping users safe while ensuring quality experiences across all domains, Google is navigating a challenging landscape in email communication. If you're experiencing issues with disappearing emails, it might be worth looking into your sending domain and considering adjustments to help your messages land where they belong.

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