SMTP Prevent is not responding to Health Check
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SMTP Prevent is not responding to Health Check

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Article ID: 159559

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Updated On:

Products

Data Loss Prevention Data Loss Prevention Network Email

Issue/Introduction

No response to Health Check with SMTP Prevent.

Resolution

SMTP Prevent will drop an incoming connection if the downstream MTA does not respond. Therefore, If SMTP Prevent is being used in reflect mode, the system generating an SMTP health check must also act as an SMTP server on the port specified by RequestProcessor.MTAResubmitPort or the SMTP health check will fail.

Reflecting Mode Health Check Example:

 

 HealthCheck Symantec DLP Email Prevent  MTA
 Create Connection ->    
   Create Connection ->  
     <- 220 Banner
   <- 220 Banner (from MTA)  
 HELO ->    
   HELO ->  
     <- 250-EHLO Response Line 1
     <- 250-EHLO Response Line 2
     <- 250-EHLO Response Line 3
     <- 250-EHLO Response Line 4
     <- 250-EHLO Response Last Line
   <- 250-EHLO Response Line 1 (from MTA if not filtered by Prevent)  
   <- 250-EHLO Response Line 2 (from MTA if not filtered by Prevent)  
   <- 250-EHLO Response Line 3 (from MTA if not filtered by Prevent)  
   <- 250-EHLO Response Line 4 (from MTA if not filtered by Prevent)  
   <- 250-EHLO Response Last Line (from MTA if not filtered by Prevent)  
 Quit ->    
   Quit ->  
     <- 221 Connection Close Message
     <- Connection Close
   <- 221 Connection Close Message  
   <- Connection Close  

 

 

Additional Information

See also:  article 159446 : How do I set up an SMTP Prevent Connectivity Check on windows?