Exiscan is an email virus scanner which works together with the Exim MTA and McAffee's uvscan or Trend Micro's vscan. It is written in Perl and is designed to be as subtle and lightweight as possible. The special thing about exiscan is that is does not resend messages after scanning them, so that the process is fully transparent to the MTA and requires only minimal reconfiguration of Exim.
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