Default timeouts for Messaging Gateway SMTP transmissions

Products

• Messaging Gateway

Issue/Introduction

Symantec Messaging Gateway (SMG) configuration timeouts for SMTP transmissions may need to be changed.

Timeout occurs when defined value is reached in each phase as bellow:

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1. When MTA doesn't exist or there is no return from the connect system call the bellow error message will be issued:

              421 4.4.0 [internal] no MXs for this domain could be reached at this time

2. When there is no  return from 220:

              450 4.4.1 [internal] Connection Timed Out

3. When there is no  return from EHLO :

              450 4.4.1 [internal] Connection Timed Out

4. When there is no return from MAIL FROM:

               450 4.4.1 [internal] Connection Timed Out

5. When there is no return from RCPT TO:

               450 4.4.1 [internal] Connection Timed Out

6. When there is no return from DATA:

               450 4.4.1 [internal] Connection Timed Out

7. When there is no return from RESET:

               450 4.4.1 [internal] Connection Timed Out
 

Resolution

The timeouts can be found in the Control Center under Administration > Host  > Configuration > SMTP > Advanced settings > Delivery.

Connection Timeout  :    30 seconds
EHLO/HELO Timeout  :    5  minutes
MAIL FROM Timeout   :    5  minutes
RCPT TO Timeout  :     5  minutes
DATA Timeout   :     10  minutes
RSET Timeout   :     10  minutes
Idle Timeout   :      5  seconds