Q&A
Obtain answers for frequently asked questions regarding your Cisco product.
- What support resources and information are important to consider after purchase?
- Can a Message Filter divert messages to the Cisco Email Security Appliance (ESA) Spam Quarantine?
- Can I whitelist or blacklist individual users via email addresses in the HAT?
- Content Security Appliances FAQ: How do you perform a packet capture on a Cisco Content Security appliance?
- Do internally generated messages such as alerts and notifications get scanned by filters, anti-spam, or anti-virus?
- Does AsyncOS support IPv6 on the ESA?
- Does Sophos Anti-Virus treat password protected Microsoft Office documents as encrypted?
- ESA FAQ: Do I still need desktop anti-virus if I enable Sophos or McAfee Anti-Virus on my ESA?
- ESA FAQ: Does the Ethernet MAC address in the configuration XML file cause problems in disaster recovery on the ESA?
- ESA FAQ: How do I force a download of Sophos or McAfee Anti-Virus updates immediately?
- ESA FAQ: How do you analyze intermittent mail delivery issues on the ESA?
- ESA FAQ: Outbreak Filters/Virus Outbreak Filters (VOF) FAQ
- ESA FAQ: How do you specify multiple destination hosts with the alt-mailhost action?
- HAT Delayed Rejection FAQ
- How are SMTP authentication events logged?
- How can I alter what ciphers are used with the Graphical User Interface (GUI)? Can I disable SSL v2 for the GUI?
- How can I identify and address a mail loop situation on the ESA?
- How can I prevent the backend infrastructure from being exposed in outbound messages?
- How can a firewall or SMTP proxy affect ESMTP services?
- How do I allow some messages from a sender with a low SBRS score, but block all other messages?
- How do I blacklist or drop a sending domain using Incoming Mail Policy and Content Filter?
- How do I bypass encryption in a content filter and DLP?
- How do I configure a relay host on the ESA for outbound mail?
- How do I configure the ESA to skip anti-spam and/or anti-virus scanning for my trusted senders?
- How do I control body and attachment scanning in filters?
- How do I decode the X-IronPort-AV header on the ESA?
- How do I filter messages that are too large?
- How do I find my Cisco Contract Number?
- How do I keep copies of messages matched by my message filter?
- How do I find the serial number of my Cisco Content Security Appliance?
- How do I migrate from local spam quarantine on Cisco Email Security Appliance (ESA) to central spam quarantine on Security Management Appliance (SMA)?
- How do I modify the subject header to flag messages that have a low SenderBase Reputation Score (SBRS)?
- How do I monitor the health of the ESA?
- How do I prevent my ESA from being used as an open relay?
- How do I search and view the mail logs on the ESA?
- How do I stop Bounce Verification from rejecting bounces on the ESA?
- How do I stop duplicate disclaimer stamping?
- How do I test Bounce Verification on the ESA?
- How do I test a message or content filter to ensure it is working as designed?
- How do I test if my domain supports TLS with CRES?
- How do I test mail and network connectivity through an ESA using smtpping?
- Configure CRES Secure Encryption Service Message Replies using TLS Encryption 12/Sep/2019
- How do you Whitelist a Trusted Sender?
- How do you use LDAP Accept Query to validate the sender of relayed messages?
- How do you use pscp on Microsoft Windows?
- How does the Exception Table on the ESA work?
- How to configure Virtual Gateways?
- I have added the domain example.com to the WHITELIST sender group, why is it not working?
- Is it possible to apply multiple certificates on an ESA and assign them to different interfaces or listeners?
- Is there a filter condition matching on the file size of single attachment(s) instead of message size?
- Simple Mail Filter on How to Quarantine a Message
- What SMTP response codes does the ESA support?
- What does "ICID lost" or "ICID close" mean?
- What does the SenderBase Reputation Score (SBRS) value of "none" mean, and how can I detect these scores?
- What does the application fault 'shared/VTLStatus.py' mean?
- What is Cisco Anti-Spam's catch rate, false-positive rate, and throughput?
- What is UNIX mbox (mailbox) format?
- What is the largest message size the Cisco ESA will accept?
- What is the release terminology for content security? (PDF - 67 KB) 25/Sep/2014
- Which is the default used IP address (AUTO) if there are multiple IP addresses on the same subnet?
- Why am I receiving an error when loading a Cisco Email Security Appliance (ESA) C350 configuration file to a C370?
- Why are disclaimers in footer displayed as attachments?
- Why are mail attachments bigger than the original file?
- Why do you see XXXXXXXA after EHLO and "500 #5.5.1 command not recognized" after STARTTLS?
- ESA FAQ: How do I set up multiple company logos on ESA and CRES?
- CRES FAQ: How do I correct the "This envelope is damaged and cannot be opened" error?
- CRES FAQ: Why is my company logo not displayed in the encrypted envelope via CRES?
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- All support information for Cisco Secure Email Gateway
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Case Studies (2)
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End-of-Life and End-of-Sale Notices (52)
Solution Overviews (1)