Icon of program: SMTP Preprocessor

SMTP Preprocessor for Windows

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Editors’ Review

Download.com staff
SMTP Preprocessor is an advanced tool for mail administrators. It intercepts, modifies, or rejects SMTP messages before your corporate server, retransmitting the results. This enhances server functionality and security with extensive control.

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SMTP Preprocessor 0/2

  • Pros

    • On-the-fly SMTP message modification and rejection.
    • Enhances corporate mail server security and functionality.
    • Extensive connection and command rejection capabilities.
    • Includes Greylisting and Tarpitting security technologies.
    • Logs all SMTP events with adjustable detail.

  • Cons

    No Cons available

Icon of program: SMTP Preprocessor

SMTP Preprocessor for Windows

Download now

Used SMTP Preprocessor for Windows?

Explore More

Full Specifications

GENERAL
Release
Latest update
Version
1.11
OPERATING SYSTEMS
Platform
Windows
Operating System
  • Windows 2000
  • Windows 98
  • Windows 7
  • Windows ME
  • Windows Vista
  • Windows 2003
  • Windows NT
  • Windows Server
  • Windows 10
  • Windows XP
  • Windows 8
Additional Requirements
VB6 Runtime library, SMTP server software
POPULARITY
Total Downloads
2,262
Downloads Last Week
13
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Last Updated

User Reviews

4.5/5

2 User Votes

Developer’s Description

By Sergey Merzlikin
Process e-mail messages before corporate SMTP server.
SMTP Preprocessor is advanced tool for mail administrators. It enhances functionality of corporate mail server. The program receives SMTP messages before corporate SMTP server, on-the-fly changes or rejects them, and retransmits result to the server. Wide range of settings allows to improve security and add new features to corporate SMTP server. SMTP Preprocessor can reject connection based on remote host IP address or DNS name (Black List), presence of reverse DNS PTR record, validity of HELO or EHLO command and connections limit; reject MAIL command based on sender address (Black List), transactions limit and message size; reject RCPT command based on recipient address (Private Recipients List), recipient domain name (Anti-Relaying), sender address (Restricted Senders List), recipients limit or based on Greylisting technology; reject out-of-order SMTP command; delay its response (Tarpitting technology); flexibly replace corporate SMTP server response or any SMTP Preprocessor generated response; replace sender in SMTP envelope (MAIL command); replace recipient in SMTP envelope (RCPT command). The program keeps adjustable detailed log of all SMTP events.
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