If you encounter attachment issues with your AT&T Net Email, there are several steps to resolve the problem. First, ensure that the file you're trying to attach is within the permissible size limit set by the email service. Next, check if the file format is supported by AT&T Net Email. If the problem of att net email issue persists, try using a different web browser or update your current one to the latest version. Disable any browser extensions that might interfere with the attachment process.