InterSys Spam & Junk Mail Email Prevention & Filters

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:

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

• Email Address Lookup Support / SPF Records

• DNS Lookups

• MIME Header Checking

• Keyword/Phrase Blocking

• ORDB (Open Relay Database Server)

• RBL (Real-Time Blackhole List)

• Black/White Lists

More statistics:

Watchguard:

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