This is an HTML version of an attachment to the Freedom of Information request 'performance of Council's email filtering system'.

Table App1.1 - Trapped Email as a percentage of all incoming emails during last 13 periods

Appendix 1 - Anti-Spam Analysis

Table App1.1 shows the number of Trapped Email as a percentage of all incoming emails during last 13 months/periods. The “Clean” column contains data on any SPAM that is not detected by the various SPAM filters. From Nov 1st 2008 Anti-spam data presented in the table above will report on QoS periods rather than calendar month.

Month

Blocked

"Clean"

Total

Blocked as

Percentage of Total

May-08

3465502

384195

3849697

90.0%

Jun-08

2920595

483596

3404191

85.8%

Jul-08

1535122

454220

1989342

77.2%

Aug-08

1710633

515862

2226495

76.8%

Sep-08

1708198

533900

2242098

76.2%

Oct-08

1819336

588547

2407883

75.6%

QoS Period

Blocked

"Clean"

Total

Blocked as

Percentage of Total

Nov-08

991995

533739

1525734

65.0%

Dec-08

868553

416612

1285165

67.6%

Jan-09

1364960

532985

1897945

71.9%

Feb-09

969017

508844

1477861

65.6%

Mar-09

475903

496282

972185

49.0%

Apr-09

110651

391392

502043

22.0%

May-09

118618

540072

658690

18.0%

Table App1.1 - Trapped Email as a percentage of all incoming emails during last 13 periods


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