Trustwave and Cybereason Merge to Form Global MDR Powerhouse for Unparalleled Cybersecurity Value. Learn More

Request a Demo
Trustwave and Cybereason Merge to Form Global MDR Powerhouse for Unparalleled Cybersecurity Value. Learn More

Request a Demo
Services
Managed Detection & Response

Eliminate active threats with 24/7 threat detection, investigation, and response.

Co-Managed SOC (SIEM)

Maximize your SIEM investment, stop alert fatigue, and enhance your team with hybrid security operations support.

Advisory & Diagnostics

Advance your cybersecurity program and get expert guidance where you need it most.

Penetration Testing

Test your physical locations and IT infrastructure to shore up weaknesses before exploitation.

Database Security

Prevent unauthorized access and exceed compliance requirements.

Email Security

Stop email threats others miss and secure your organization against the #1 ransomware attack vector.

Digital Forensics & Incident Response

Prepare for the inevitable with 24/7 global breach response in-region and available on-site.

Firewall & Technology Management

Mitigate risk of a cyberattack with 24/7 incident and health monitoring and the latest threat intelligence.

View All Trustwave Services
Solutions
BY INDUSTRY
BY REGULATION
BY TOPIC
Microsoft Security
Unlock the full power of Microsoft Security
Offensive Security
Solutions to maximize your security ROI
Rapidly Secure New Environments
Security for rapid response situations
Securing the Cloud
Safely navigate and stay protected
Securing the IoT Landscape
Test, monitor and secure network objects
Why Trustwave
About Us
We reduce cyber risk and fortify organizations
Awards and Accolades
Recognition by analysts and media outlets
Trustwave SpiderLabs Team
Global researchers, ethical hackers, and responders
Trustwave Fusion Security Operations Platform
Unprecedented security visibility and control
Trustwave Security Colony
Access to cybersecurity threat protection resources
Partners
Technology Alliance Partners
Key alliances who align and support our ecosystem of security offerings
Trustwave PartnerOne Program
Join forces with Trustwave to protect against the most advance cybersecurity threats
Register
Login
Resources
BLOGS
UPCOMING
MEDIA & ASSETS
NOTICES
HELP
Loading...
Loading...

Trustwave Knowledge Base

Home » Knowledgebase » Trustwave MailMarshal (SEG) » ERRMSG: 2508 - DNS alert raised (MMReceiver warnings)

ERRMSG: 2508 - DNS alert raised (MMReceiver warnings)

Expand / Collapse
Show/Hide Article Tools


This article applies to:

  • Trustwave MailMarshal (SEG) 

Symptoms:

Event ID: 2508
Type: Warning
Source: MMReceiver
Description: DNS alert raised

The configured DNS server is not responding to queries from the MailMarshal SMTP Receiver service.

Causes:

This event is raised whenever the MailMarshal Receiver service encounters a number of successive failures querying DNS (by default, 3).

The MailMarshal Receiver uses DNS for DNS Blocklist queries and other verification purposes.

This issue is typically due to slow or unresponsive DNS servers, or basic network connectivity issues between MailMarshal and the host configured as MailMarshal's DNS server.

  • In recent versions of SEG the Controller service performs DNS lookups and maintains a cache.

More Info:

MailMarshal uses the DNS servers configured in its "Delivery" settings for all DNS-related queries. These may not be the same DNS servers configured on the computer's network interface.

For more information, see Q10050: DNS alerts appear in the MailMarshal Console.

To contact Trustwave about this article or to request support:

Rate this Article:
     

Add Your Comments


Comment submission is disabled for anonymous users.
Please send feedback to Trustwave Technical Support or the Webmaster.


Execution: 0.047. 9 queries. Compression Disabled.
Powered by InstantKB.NET