| MailShield Server Features |
v4.0 Standard |
v4.2 Professional |
| Administration and Reporting |
| Coexistence with major mail servers |
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| Compatibility with anti-virus applications |
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| Logging of mail activity |
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| SQL database back-end for recording all SMTP sessions |
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| Selective data recording |
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| Inbound/outbound email auditing |
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| Email quarantine for end-user review |
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| Advanced reporting |
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| MailShield clustering |
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| Anti-spam and Filtering Functionality |
| 50+ customizable filters, based on headers, envelope information, keywords, regular expressions, and attachments |
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| Perl script customization for mail identification, processing, and disposal |
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| "Fuzzy Logic" points-based anti-spam filtering |
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| SpamAssassin™ anti-spam engine |
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| Mailshell™ Spam Recognition System (MSRS) anti-spam engine |
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| DNS Block List Aggregator |
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| Unauthorized relay blocking |
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| Tarpitting based on domains, IP addresses, and other headers |
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| Global "white" and "black" lists |
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| Dictionary-attack protection |
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| False-positive reporting |
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| End-user "white" and "black" lists |
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| End-user anti-spam spam settings, based on MSRS anti-spam engine |
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| Per-recipient address handling, for customized routing of acceptable and unwanted email |
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| Platforms and Databases |
| Available platforms |
Windows and Solaris |
Windows, Linux and Solaris |
| Compatible databases |
n/a |
MSSQL, MSDE, Oracle and PostgreSQL |