How Spam Filter works in Gmail?

Gmail uses various techniques to filter spam and prevent it from reaching users' inboxes. Some of the methods include:

1. Gmail scans the content of incoming emails and checks for specific patterns or keywords commonly found in spam messages. If an email matches these patterns, it is flagged as spam and sent to the spam folder.
2. Gmail maintains a list of known spammers and blocks emails from these senders before they even reach a user's inbox.
3. Gmail allows users to report spam by clicking the "Report spam" button. This feedback improves the spam filter and identifies new spam patterns.
4. Gmail uses machine learning algorithms to learn from user behaviour and identify new spam patterns. These algorithms analyze various signals, such as the sender, subject line, and content of emails, to determine whether an email is likely to be spam.
5. Gmail shares spam data with other email providers to improve spam filtering across the entire email ecosystem.

Using these techniques and constantly refining its algorithms, Gmail can provide users with a highly effective spam filter that blocks most unwanted emails. But sometimes you may face issues like the Gmail spam filter not working.

Why is Gmail Spam Filter Not Working?

1. Gmail's Spam Filter is designed to filter out spam emails based on its algorithms automatically. However, if the filter settings have been altered or modified, it could result in the filter not working correctly.
2. Gmail's spam filter relies on algorithms based on specific criteria, such as the sender's email address, message content, and other factors. If the spam emails are not meeting these criteria, they may not be identified as spam by the filter.
3. Sometimes, spam emails may be sent from a reputable source, such as a legitimate company or organization. In such cases, Gmail's spam filter may not be able to identify the email as spam, and it may end up in your inbox.
4. The spam filter may have been disabled in your Gmail settings. To check this, go to your Gmail settings and look for the "Filters and Blocked Addresses" tab. Make sure that the spam filter is turned on.
5. Gmail's spam filter is designed to learn from your email habits and preferences over time. If you have not been using Gmail for very long or have not been actively training the spam filter, it may not be working as effectively as it could be. 

Why am I not receiving emails?

1. The email might have been sent to an incorrect address, so you are not receiving it. Double-check to ensure that the email address is correct.
2. The email might go to your spam or junk folder instead of your inbox. Check these folders and mark the email as "Not Spam" if it is mistakenly classified as spam.
3. You might have set up an email filter blocking the email. Check your email filter settings to ensure they are not blocking the email.
4. The email server might be experiencing issues, which could cause delayed or not delivered emails. Contact your email provider to check if they are experiencing any problems.
5. Your email storage limit may have been exceeded, and new emails are not being delivered. Check your email storage capacity and delete old emails if necessary.

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If none of these solutions works, contact your email provider for further assistance on why am I not receiving emails.