u/FomexSystems

We’re seeing some legitimate transactional HTML emails getting quarantined in Proofpoint-protected environments, while the plain-text versions deliver fine.

SPF, DKIM, and DMARC are properly aligned, and these are authenticated customer emails, not cold outreach.

Our HTML templates are MJML-based and include standard tracking elements like:

• Open-tracking pixels
• Hidden preheaders
• Invisible tracking markup

Curious if anyone has seen Proofpoint react negatively to:

• Hidden spans/divs
• 1×1 tracking pixels
• MJML-generated nested HTML
• Invisible tracking links

If anyone manages a Proofpoint environment and is open to helping us test/debug a few sanitized samples, we’d really appreciate it.

Thanks!