Cisco Cisco Email Security Appliance C190 Mode D'Emploi
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Cisco IronPort AsyncOS 7.5 for Email Configuration Guide
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Chapter 4 Understanding the Email Pipeline
LDAP Recipient Acceptance
LDAP validation for recipient acceptance occurs within the
SMTP conversation. If the recipient is not found in the LDAP
directory, the message is dropped or bounced. LDAP validation
can be configured to occur within the work queue instead.
SMTP conversation. If the recipient is not found in the LDAP
directory, the message is dropped or bounced. LDAP validation
can be configured to occur within the work queue instead.
SMTP Call-Ahead Validation
SMTP call-ahead recipient validation occurs within the SMTP
conversation. The SMTP conversation is paused while the Email
Security appliance calls ahead to the external SMTP server. The
message is dropped or bounced, or the mailing action is allowed
depending on the SMTP server response.
conversation. The SMTP conversation is paused while the Email
Security appliance calls ahead to the external SMTP server. The
message is dropped or bounced, or the mailing action is allowed
depending on the SMTP server response.
Table 4-1
Email Pipeline for the Cisco IronPort Appliance: Receiving Email Features