<h3>Issue Summary</h3> <p> You’re attempting to use <strong>DropMail</strong> to import files via email, but no files are being received or processed by PaperOffice. </p>
<h3>Root Causes & Explanations<br><br></h3> <ul> <li><strong>No attachments present:</strong> DropMail only processes file attachments, not email content or inline media.</li> <li><strong>Unrecognized or unauthorized sender:</strong> Sender email must be verified. Emails from unknown or misconfigured domains may be rejected.</li> <li><strong>Blacklisted sender:</strong> Sender's domain or IP address may be flagged in spam or security blacklists.</li> <li><strong>Invalid MIME or encoding:</strong> Emails must follow RFC standards with correctly encoded MIME parts.</li> </ul>
<h3><br></h3><h3>Advanced Troubleshooting Steps<br><br></h3> <ol> <li> <strong>Confirm PaperOffice Services Are Running:</strong> Ensure that all PaperOffice services are active and not blocked by firewalls or antivirus software. </li> <li> <strong>Validate Email Attachment:</strong> Ensure the email includes at least one file attachment. Inline images or embedded items will not be processed. </li> <li> <strong>Verify Sender Domain Configuration:</strong> Sender's domain must have valid SPF, DKIM, and DMARC records. SSL/TLS certificates must be properly configured. </li> <li> <strong>Check Sender Reputation:</strong> Use <a href="https://www.mail-tester.com/" target="_blank">mail-tester.com</a> to evaluate the sender address. Aim for a score of 10/10. </li> <li> <strong>Test with Alternate Email Accounts:</strong> Try sending from a different provider to rule out sender-specific issues. </li> <li> <strong>Validate Email Format:</strong> Ensure email subject and body use UTF-8 encoding and are properly formatted. </li> <li> <strong>Review Blacklist Status:</strong> Check if the sender’s domain or IP is listed in public blacklists like: <ul> <li><a href="https://check.spamhaus.org/" target="_blank">Spamhaus</a></li> <li><a href="https://mxtoolbox.com/blacklists.aspx" target="_blank">MXToolbox</a></li> </ul> </li> </ol>
<h3><br></h3><h3>Security Notes</h3> <p>DropMail applies advanced security protocols including:</p> <ul> <li>SPF, DKIM, and DMARC domain verification</li> <li>SSL/TLS certificate checks</li> <li>MIME-type validation</li> <li>Anti-spam and spoofing heuristics</li> <li>Attachment fingerprinting (Enterprise tier)</li> </ul>
<h3><br></h3><h3>Example Mail-Tester result</h3> <p><img src="https://api.paperoffice.ai/latest/knowledge/image/15/7f055968a7687820a847d80c664311cedfe43eae451d77900edabe711da66ead" data-filename="mail-tester.png"><br></p>