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McAfee SaaS Email Protection Training Guide – Group Administrator Role

Proprietary and Confidential Page 6-15

 A file contained in the zip file is too large (> 100MB)

 The zip file contains too many files (> 1500 files)

 The compression rate is too high (> 95% compressed)

 The zip file contains too many levels of nesting (> 3 levels)

An encrypted zip attachment is a zip archive file that is password protected and encrypted.

A zip file is an archive file that contains other files and folders, typically in a compressed format. A

zip archive contains an index, which lists each file included in the archive by name.

The filenames listed in the archive index are scanned to determine if an attachment type or

attachment filename policy is violated.

Deny Messages where the total size exceeds:

Message can be denied based on their if it exceeds the total message size. Message sizes range

from 10 Mb to 200MB and use 10 MB increments. The system default is 200 MB.

6.8. Allow / Deny

The Allow/Deny lists allow the Administrator to define lists of trusted or not trusted senders.

Lists can be uploaded and downloaded into other policies. To upload an allow or deny list, create a

text file no larger than 100K and select the upload button within the policy.

The Allow & Deny entries can be:

 Complete TCP/IP Address (i.e. 10.120.50.1) *

 Partial address with wild cards (i.e.10.120.50.*) *

 Qualified domain name (i.e. domain.com)

 Subdomains (i.e. *@*domain.com)

 Complete Sender Address (i.e. user@gmail.com)

 Partial address (i.e. user*@gmail.com)

 1,500 entry limit on each list

* IP addresses cannot be used for SPF records

How the Allow list works

If a domain name or email address is not listed in the Allow box, the message is scanned using all

sections of the inbound policy.

When you first add a domain name or email address to the Allow list, the entry displays a red X.

This means the message is not verified against its Sender Policy Framework (SPF) record, but is

scanned for viruses and Enforced TLS (if TLS is enabled).

If the message does not violate the virus and TLS policies, the message is not filtered for spam,

content and attachment violations.

How Sender Policy Framework Works

Sender Policy Framework (SPF) is a method, which helps prevent sender address forgery. Once

the domain name or email address is added to the Sender Allow list, that domain or email address is

verified using SPF validation. When the recipients SMTP server receives an email, a SPF validation

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McAfee OFFICE 3.1 Manual de usuario Pagina 37