Tag Archives: ESA

ESA (Ironport) SenderBase and DNS. How It Works?

Applies to Cisco E-Mail Security Appliance 9.x.x Thanks to my colleague Sedat Tavukçu for testing and supporting this post. SenderBase Documentation: If you read Cisco Email Security Appliance  documentation, review the pictures for Sender Base process you may think that … Continue reading

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SOLUTION: Cisco ESA (Ironport) Mails are backing up (waiting) in the workqueue. If URL Filtering configured

Applies to: Cisco Email Security Appliance 9.1.0-032 and above with URL Filtering. Symptoms: Outgoing and incoming internet mails are delivered with a delay. Workqueue command shows up to 5000 mails in the queue. If you track the messages you noticed … Continue reading

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What is IronPort-PHdr Mail Header?

Question: What is IronPort-PHdr Mail Header? Applies To: Cisco Email Security Appliance (ESA aka Ironport) ver 9.6.0-042 Answer: ESA now has new feature called Gray Mail. Which classifies marketing, social media and bulk mailing and allows you to take an … Continue reading

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Solution: Virtual Cisco Email Security Appliance console hangs

Applies to: VMWare ESXİ 5.X Cisco Virtual E-mail Security Appliance 9.x (ESA aka Ironport) Problem: During initial installation of Virtual ESA on VMWare you use CLI console using vSphere Client. But sometimes (I suspected that If you change Network Card … Continue reading

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