Cisco Cisco Email Security Appliance X1070 Guia De Resolução De Problemas

Contributed by Cisco TAC Engineers.

Nov 10, 2014

What does the "Possible Delivery" feature do?

When the Possible Delivery feature is enabled, AsyncOS treats any message as a "possible delivery" if it
times out after the body of the message is delivered, but before the recipient host acknowledges receipt of the
message.  This functionality prevents recipients from receiving multiple copies of a message if continuous
errors at their recipient host prevent acknowledgement of receipt. AsyncOS logs this recipient as a possible
delivery in the mail logs and counts the message as completed.

myesa.local> deliveryconfig

Default interface to deliver mail: Auto

"Possible Delivery": Enabled

Default system wide maximum outbound message delivery

concurrency: 10000

Default system wide TLS maximum outbound message delivery

concurrency: 100

Choose the operation you want to perform:

− SETUP − Configure mail delivery.

[]> setup

Choose the default interface to deliver mail.

1. Auto

2. Management (192.168.0.199/24: myesa.local)

[1]> 

Enable "Possible Delivery" (recommended)? [Y]> 

Please enter the default system wide maximum outbound message

 delivery concurrency.

[10000]> 

Please enter the default system wide TLS maximum outbound message

delivery concurrency.

[100]> 

The timeout is a TCP timeout, normally 5 minutes. SMTP will timeout before 4 minutes.