How do I test Bounce Verification on the ESA?

Available Languages

Updated:August 5, 2019
Document ID:118466

Bias-Free Language

The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.

    Introduction

    This document describes how to test Bounce Verification (BV) on the Email Security Appliance (ESA).

    How do I test Bounce Verification on the ESA?

    AsyncOS defines bounces as mail with a null Mail From address (< >).  In order to determine if BV is configured, you can send test messages with null Mail From address through the ESA. Bounce Verification sees the messages as 'untagged' bounces and processes them according to your configuration.

    You can view test messages within the ESA mail logs or during a manual SMTP conversation:

    • Connect to ESA using telnet
    telnet  esa.example.com 25
    Trying 192.168.1.254...
    Connected to esa.example.com.
    Escape character is '^]'.
    220 esa.example.com ESMTP
    helo
    250 esa.example.com
    • MAIL FROM command with null sender address
    mail from:
    250 sender <> ok
    rcpt to: testuers@example.com
    550 #5.1.0 Rejected by bounce verification.

    Revision History

    Revision Publish Date Comments
    1.0
    09-Oct-2014
    Initial Release
    TAC Authored

    Contributed by Cisco Engineers

    • Jerry Orona
      Cisco TAC Engineer
    • Enrico Werner
      Cisco TAC Engineer

    Was this Document Helpful?

    FeedbackFeedback

    Contact Cisco

    This Document Applies to These Products