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Mails with attached compressed files are being bounced by Hosted Email Security (HES)

    • Updated:
    • 4 Aug 2016
    • Product/Version:
    • Hosted Email Security 2.0
    • Platform:
    • Not Applicable N/A
Summary

HES/HES - Inbound Filtering users do not receive mails with compressed attachments that are sent to them. The Mail Tracking logs in HES show that the mail was “Bounced”.

Details
Public

HES / HES - Inbound Filtering has the following global limits:

  • Total message size exceeds 50 MB
  • Total # recipients exceeds 1000 recipients
  • Total # embedded layers in compressed file exceeds 20
  • Total decompressed size exceeds 60MB
    Note: The 60 MB capacity took effect on November 25, 2011.
  • Total # files in compressed file: 353 files
  • Compress ratio limit exceeds: 99%
  • RTF Scan Layer exceeds: 5
  • OLE Scan Layer exceeds: 5

Mail attachments that violate the above limits are automatically rejected/bounced by HES. To resolve the issue, do any of the following:

Option 1: Ask senders to password-protect compressed attachments. By doing this, scanning of these files are bypassed.

Option 2: HES full version users can modify the action.

Note: This option only bypasses the below global limits, others needs to use Option 1.

  • Total # files in compressed file: 353 files
    • "Scan exception - security setting violation with error code -69"
  • Compress ratio limit exceeds: 99%
    • "Scan exception - other scanning violation with error code -71"
  1. Log on to the HES portal.
  2. Click Inbound Protection then Policy.
  3. On the Rules tab, select Virus rule.
  4. Under Scan Limitations, click Action and select either Reject or Bypass the message.

    Scan Limitations

    Click image to enlarge.

Premium
Internal
Rating:
Category:
Configure
Solution Id:
1055580
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