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SpamHaus' definition of UBE:
Unsolicited means that the Recipient has not granted verifiable
permission for the message to be sent. Bulk means that the message
is sent as part of a larger collection of messages, all having
substantively identical content.
A message is Spam only if it is
both Unsolicited and Bulk.
- Unsolicited Email is normal
email
(examples: first contact enquiries, job enquiries, sales
enquiries)
- Bulk Email is normal email
(examples: subscriber newsletters, customer communications,
discussion lists)
According to
Symantec, 70 per cent of total email volume in February 2007 was
spam. 38 per cent of these displayed spam messages in the form
of images, foiling less sophisticated anti-spam software.
MessageLabs believes the global
ratio of spam in email traffic was 77.8 per cent (or one in 1.29
emails). They also estimate that over 55 per cent of all
malicious emails intercepted in February 2007 were phishing attacks.
InterSys Anti Spam Services
InterSys supplies and
supports Spam / UBE prevention & email filtering solutions - from
external managed services to IPS devices or mail server filtering
software.
| Reduce the processing
overhead on your systems by placing a dedicated anti spam or IPS
device outside of the firewall zone or by using a third party
service. Alternatively, stop spam at the email / exchange server
with mail filtering software. |
Astaro:
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Typically these employ
the following methods to identify and deal with spam before it has a
chance to disrupt your business
-
Signaturing
Databases
-
IP Address
Blacklist/Exempt List
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Email Address
Lookup Support / SPF Records
-
DNS Lookups
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MIME Header
Checking
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Keyword/Phrase
Blocking
-
ORDB (Open Relay
Database Server)
-
RBL (Real-Time
Blackhole List)
-
Black/White Lists
Watchguard:
More statistics:
The daily worldwide volume of spam
messages jumped from 7 billion in 2002 to 23 billion in 2004.
Internet Service
Providers and Antispam Solution Vendors report that spam [in 2004]
represented 50-95% of all inbound Internet email, somewhat
higher than in 2003 and triple the reported 2002 levels of 1-30%.
Source: IDC
Fortinet:
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