Hosted Email Security (HES) 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”.
HES 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. This option only bypasses the global limits, as seen below. Others would need to use Option 1.
|The number of files in a compressed file exceeds 353.||Delete , Notify|
|The decompression ratio of a compressed file exceeds 100.||Delete , Notify|
|The number of decompression layers in a compressed file exceeds 20.||Delete , Notify|
|The size of a single decompressed file exceeds 60 MB.||Delete , Notify|
|An Office 2007/2010/2013/2016 file contains more than 353 subfiles.||Delete , Notify|
|An Office 2007/2010/2013/2016 file contains a subfile whose decompression ratio exceeds 100.||Delete , Notify|
|Virtual Analyzer scan exception.||Delete , Notify|
|Malformed messages.||Delete , Notify|
- Log on to the HES portal.
- Click Inbound Protection then Scan Exceptions.
- Click Action and select one of the following:
- Do Not Intercept
- Delete Entire Message