Hi, Basically, you should put a mail gateway in front of your mail server that can integrate your list of valid email recipients and that can refuse most of your messages based on your anti-spam and anti-virus policies.
One option would be to run Declude's own gateway product. However, to me a crucial element of a gateway is that it MUST reject messages DURING the SMTP envelope (e.g., after the data is received but before the receipt is confirmed with a 2xx.). This way, the gateway can refuse unwanted messages with a 5xx (or 4xx) return code and the SENDING SMTP server will inform its user. It is an absolute must in case of the occasional false positive. At least a "good" sender will be notified that there's a problem with their email. If a gateway first accepts messages and THEN scans them, it would need to generate "bounce" messages AFTER the fact. The result is a very high likelihood that your system will be spamming innocent email users whose address had been faked. I simply can't consider any gateway product that doesn't do spam/virus rejection DURING the SMTP envelope! One alternative could be to set up IIS SMTP on one of your machines, point your MX there, purchase ORF and then integrate it with Sniffer so that it can reject the vast majority of your spam. If you also bring your list of valid email recipients over to that IIS/ORF/Sniffer gateway, then you can reject invalid recipients (e.g., dictionary attacks) at that machine, instead of tying up Imail with that. Best Regards Andy Schmidt Phone: +1 201 934-3414 x20 (Business) Fax: +1 201 934-9206 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of netsolution webmaster Sent: Tuesday, November 14, 2006 09:59 AM To: declude.junkmail@declude.com Subject: [Declude.JunkMail] delete mails before processing / 100% CPU With the massive amount of spam mail our server has difficulties to process everything in time, since two days we are on 100% CPU and customers have difficulties with pop/imap speed (before everything was ok). What ways are there to - refuse mails that have no valid recipient on the mailserver (not bounce, just refuse/drop) so they need no more processing? - refuse/drop mails that don't pass certain tests (eg. spamcop or sniffer)? OR what other methods could speed up things? We have older versions of declude /imail server (8.15) Thanks --- This E-mail came from the Declude.JunkMail mailing list. To unsubscribe, just send an E-mail to [EMAIL PROTECTED], and type "unsubscribe Declude.JunkMail". The archives can be found at http://www.mail-archive.com. --- This E-mail came from the Declude.JunkMail mailing list. To unsubscribe, just send an E-mail to [EMAIL PROTECTED], and type "unsubscribe Declude.JunkMail". The archives can be found at http://www.mail-archive.com.