Sandy, I've tested the previous version and it seem's working great. The next step will be testing it with several thousands of valid recipients.
Would it be an idea to develope it in this way that different virt. IIS-SMTP-Services can use 5xxSink with different prescan.txt and rcptlist.txt So for example if I have one domain with many valid recipients I can configure it on a separate IP/MX/IIS-virt-SRV, in order to avoid that messages for some hundred or thousands of other domains - each one with one up to around 20 valid recipients - must be checked against the entire list of valid recipients of the big domain. Markus > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > Sanford Whiteman > Sent: Monday, December 12, 2005 9:13 AM > To: Declude.JunkMail@declude.com; > IMail_Forum@list.ipswitch.com; Declude.Virus@declude.com; > sniffer@SortMonster.com > Subject: [Declude.JunkMail] ANN: 5xxSink 0.5.01 update, IIS > SMTP text-file recipient validator now supports 'nobody' > wildcard domains > > ---------------------- > 5XXSINK Release 0.5.01 > 12/12/2005 > ***** > > Release notes for this version: > > [ + Added feature ] > [ * Improved/changed feature ] > [ - Bug fix ] > [ ^ Cosmetic/naming change ] > > [+] Added new feature, RHS PRESCANNING, to help with > processing of large recipient lists under certain > circumstances. The prescan.txt file, if it exists, is > scanned before the rcptlist.txt. If a match is found, > processing continues in rcptlist.txt. If no match, 550 > is returned immediately. If no prescan.txt is found, the > feature is not enabled. > > The intent of prescan.txt is that it can be a global > repository for allowed RHS (right-hand-side, i.e. domain) > strings. You list all of your domains in prescan.txt as follows: > > @example.com > @example.net > etc. > > When messages are processed, they are FIRST matched against this list. > This allows you to cut down the initial scan for > recipients at _unknown_ domains substantially; for example, > if you have 100 hosted domains with 100 users each, and > you are the erroneous victim of a directory harvesting > attack against a domain you DO NOT host, rejections > with prescan.txt in place will take 1% of the time they if > the entire rcptlist.txt were scanned! However, be somewhat careful: > scanning prescan.txt does add its own overhead. If > you are not concerned about such pure-DoS attacks, you will > end up lengthening the lookup time for each recipient, > though likely the effect would be negligible. > > NOTE #1: if prescan.txt is enabled, users _must_ have > their domain listed in prescan.txt AND their username in > rcptlist.txt (or, if they are in a wildcard domain, they > must have that domain listed in prescan.txt _and_ in rcptlist.txt). > > NOTE #2: RHS prescanning is not the same as domain > wildcards. Do not be confused. See below. > > [*] Official support for DOMAIN WILDCARDS. This > support in fact existed previously, but I was determined > to discourage people from using it, since I'm such an > opponent of 'nobody' setups. Well, a few people wrote to > me and changed my mind. Anyway, when you enter > wildcards, you do not use the asterisk (*) character. You > simply enter domain names like so: > > @example.com > [EMAIL PROTECTED] > @example.net > [EMAIL PROTECTED] > > You may as well put your domain wildcards at the top of your > list, so they get processed first. You're going to need > all the help you can get processing the backscatter. . . . > > --Sandy > > > ------------------------------------ > Sanford Whiteman, Chief Technologist > Broadleaf Systems, a division of > Cypress Integrated Systems, Inc. > e-mail: [EMAIL PROTECTED] > ------------------------------------ > > --- > [This E-mail was scanned for viruses by Declude EVA www.declude.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. > --- [This E-mail was scanned for viruses by Declude EVA www.declude.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.
