To configure SMTP filter buffer overflow thresholds

  1. In the console tree of ISA Server Management, click Add-ins.
  2. In the details pane, on the Application Filters tab, click SMTP Filter.
  3. On the Tasks tab, click Configure Selected Filter.
  4. On the SMTP Commands tab, click the applicable command, and then click Edit.
  5. In SMTP Command Rule, select Enable SMTP command.
  6. In Maximum Length, type the maximum length of the command line for the commands.



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