SMTP Preprocessor 1.09 Description:

SMTP Preprocessor is advanced tool for mail administrators. It enhances functionality of corporate mail server. SMTP Preprocessor will receive SMTP messages before corporate SMTP server, on-the-fly change or reject them, and retransmit 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 (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) and transactions limit; reject RCPT command based on recipient address (Private Recipients List), recipient domain name (Anti-Relaying), sender address (Restricted Senders List) and recipients limit; reject out-of-order SMTP command; 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.

SMTP Preprocessor can:
· reject connection based on remote host IP address and 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), message size and transactions limit;
· 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;
· 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).

SMTP Preprocessor 1.09 Requirements:

· VB6 Runtime library, permanent Internet connection, SMTP server software

SMTP Preprocessor security information

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