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1. How does Mailshell Anti-Spam
detect spam?
2. How does Mailshell handle foreign languages?
3. How often are rules updated?
4. How does it prevent false positives?
5. How does it prevent future spam?
6. How reliable is Mailshell's enterprise software?
7. How does it operate?
8. What is the capacity of the Mailshell
Network?
9. What is the processing capacity of the Gateway
software product.
10. How much is accuracy degraded if we don't
connect to the network?
11. What is the performance impact of the
software?
12. How do I create and manage per user Spam
folders?
1. How does Mailshell Anti-Spam
detect spam?
Mailshell looks for, catches and analyzes
spam, 24x7, sent to millions of email accounts at AOL, Hotmail,
Yahoo!, AT&T, Earthlink, Mailshell, and others representing
over 95% of all spam sent out on the Internet.
Mailshell then creates rules based on all
attributes of the message to identify and blacklist spam
immediately. Our Anti-Spam software automatically checks
for new rules and updates itself. Thousands of rules are
applied and combined by Bayesian theorems for a final spam
probability score. New, never before seen spam is immediately
caught.
Mailshell also monitors and maintains the
proprietary Mailshell Network database. The Mailshell
Network tracks millions of messages in real-time to determine
which messages are sent in bulk and whether the bulk messages
are wanted by users. The Mailshell Anti-Spam software creates an
anonymous fingerprint ID of the email and immediately checks
the Mailshell Network if the email is spam. When users
approve or block an email, the Mailshell Anti-Spam software immediately
updates the Mailshell Network. Spam is blocked throughout
the network as soon as it is detected.
Mailshell allows users to customize how spam
is caught. The user is allowed to specify a personal 'always
approved' list and a personal 'always block' list. The software
intelligently adapts based on what the user blocks, allows,
reads, replies to, and deletes.
Our rules include major third-party spam databases
and RBL blacklists, as well as rules to handle mail bombs,
mail DoS, and mail flood detection.
2. How does Mailshell handle
foreign languages?
Many of our rules handle foreign languages
and the Mailshell Network is language neutral. However,
some reduction in the percentage of spam caught is likely
for email sent in foreign languages.
3. How often are rules updated?
Rules and weightings are updated usually every
10 minutes.
4. How does it prevent false
positives?
False positives in general are due to ambiguity
as to the reputation of the bulk sender. We maintain a large
database of reputable senders and track user feedback to
accurately determine bulk sender reputation. The probability
algorithms only catch messages which are very likely spam
and very unlikely to be legitimate messages. To learn more
about Mailshell Anti-Spam's accuracy versus error rates,
see our white paper.
5. How does it prevent future
spam?
The software learns and adapts in real-time
and personalizes the algorithms for each user so that spammers
can not easily target a large audience.
6. How reliable is Mailshell's
enterprise software?
The software is based on more than 3 years
of development and testing. Over 700,000 users have trusted
the Mailshell commercial service for more than 2 years.
The software requires very low memory usage and large enterprises
can choose even higher availability via clustering support.
7. How does it operate?
Our Gateway proxy software currently requires
Linux operating system 2.2+ running on the x86 platform.
There is also a version available for Windows 2000/XP. It
runs as a SMTP proxy which listens on a specified port and
forwards messages to another destination SMTP server.
8. What is the capacity of
the Mailshell Network?
It is designed to scale to over 1 billion
requests per day.
9. What is the processing
capacity of the Gateway software product.
The Mailshell Anti-Spam proxy software currently processes
700,000 messages per day per CPU.
10. How much is accuracy
degraded if we don't connect to the network?
The Mailshell Network separates Mailshell's
solution from the myriad of products that rely exclusively
on rules-based filtering. While the software still catches
the vast majority of spam without checking the Network,
eliminating this step will likely result in roughly 20%
less caught spam. To learn more about Mailshell Network's
Network's impact on filtering accuracy, see our white
paper.
11. What is the performance
impact of the software?
On average, messages are delayed by less
than a second. Most of the delay is due to accessing the
Mailshell Network database. 99% of messages are delivered
within 5 seconds.
12. How do I create and
manage per user Spam folders?
To create and manage per user Spam folders,
Mailshell currently offers plugins for the following mail
servers:
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