TLS Reporting Tool: Fix Email Delivery Failures

Quickly detect why your emails are not being delivered and resolve encryption issues with actionable TLS-RPT reports using PowerDMARC’s SMTP TLS Reporting tool.

Contact us How Does TLS-RPT Work?
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What Is TLS-RPT?

SMTP TLS Reporting (TLS-RPT) is a standard that enables the reporting of issues in TLS connectivity that is experienced by applications that send emails and detect misconfigurations. This email security standard, defined in RFC 8460, provides detailed feedback on TLS encryption failures during email delivery. Instead of wondering why your emails fail to reach recipients, TLS-RPT tool gives you the visibility to understand exactly what’s happening with your email channels.

When TLS encryption attempts fail during SMTP communications, your emails may be delivered unencrypted or not delivered at all. TLS-RPT works alongside MTA-STS to report these critical delivery issues, providing the data you need to maintain secure email communications and prevent man-in-the-middle attacks.

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How Can PowerDMARC Help You?

TLS reports arrive as complex JSON files that are nearly impossible to interpret manually, but PowerDMARC automatically converts these technical reports into clear, actionable dashboards that reveal exactly what’s affecting your email delivery.

  • TLS-RPT is fully integrated into the PowerDMARC security suite so that as soon as you sign up with PowerDMARC and enable SMTP TLS Reporting for your domain, we take the pain of converting the JSON files containing your reports of email delivery issues, into simple, readable documents that you can go through and understand with ease!

  • On the PowerDMARC platform,  TLS-PT aggregate reports are generated in two formats for ease of use, better insight, and enhanced user-experience, as shown below:

    Aggregate Reports Per Result:

    Aggregate Reports Per Sending Source:

  • Moreover, PowerDMARC’s platform automatically detects and subsequently conveys the issues you are facing, so that you can promptly address and resolve them in no time!

How Does a TLS Reporting Tool Work?

  • TLS-RPT is enabled to support the MTA-STS protocol that ensures all emails addressed to your domain are TLS encrypted. The sending email server or Mail Transfer Agent (MTA) communicates with the receiving server to specify whether it supports the STARTTLS command. If it does, the email gets encrypted with TLS and gets delivered to the receiving MTA.

  • Without MTA-STS, an attacker may initiate an MITM TLS downgrade attack, replacing or deleting the STARTTLS command so that the email gets sent to the receiving server without TLS encryption, in cleartext. This leaves room for the cybercriminal to view and tamper with the content of the email.

  • Implementing MTA-STS enforces sending servers to always send emails over an encrypted connection to your domain so that even if an attacker launches a downgrade attack the email would not be sent at all instead of being sent in cleartext.

  • TLS-RPT then comes into play, by providing the domain owner with diagnostic reports (in JSON file format) with elaborate details on emails addressed to your domain and are facing delivery issues, or couldn’t be delivered due to a downgrade attack or other issues, so that you can fix the problem proactively.

Learn more with the help of our detailed guide on TLS-RPT.

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Why Do You Need SMTP TLS Reporting?

  • Security: Detect Attacks

    TLS-RPT tools alerts you to potential downgrade attacks where cybercriminals force your emails into unencrypted channels. These notifications are critical because they reveal active threats that could otherwise go unnoticed, protecting sensitive communications from interception.

  • Visibility: Eliminate Blind Spots

    Without TLS-RPT, you can’t see why emails fail to reach recipients or when they’re delivered without encryption. This protocol clearly defines the problem by showing exactly where and why TLS encryption breaks down, eliminating the guesswork from email troubleshooting.

  • Efficiency: Faster Troubleshooting

    Instead of spending days investigating delivery issues, TLS-RPT helps you find problems fast. Detailed failure reports pinpoint specific misconfigurations, server issues, or policy violations, enabling rapid resolution of email delivery problems.

Guarantee total email deliverability, only with PowerDMARC. Get your solution today! 

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