On Sat, 29 Jul 2000 00:13:37 -0400 (EDT), [EMAIL PROTECTED] (Howard Eisenberger) wrote: > [EMAIL PROTECTED] (Eric S. Emerson) wrote: >> I don't understand this discussion. >> What is ORBS and this open relays stuff? Why would >> Arachne be blocked, what ever that means? > Say you have three ISP'a A, B, C. The mailserver at A will normally > relay e-mail from A to B and C, and from B and C to A. > If the mailserver at A does not relay e-mail from B to C or C to B, > it is closed (relaying denied). This is now considered "best practice" > on the Internet (RFC2505). I mentionent in the list that uploading the e-mail to my new ISP is not possible.... (relaying denied) and it seems some extra verification is needed. Probably user name and password must be given again like you have to do at downloading mail with POP server. However Michael told me that this is not possible with Arachne. So for the moment I stick to the old ISP. Howard stated: "This is now considered best practice on the Internet". If so we might expect to see more ISP's install closed relays that cann't be reached with Arachne. Would it be very difficult to add verification to SMTP mailing? After all secured POP-downloading is installed in Arachne..... > If the mailserver at A does relay e-mail from B to C or C to B, > it is open. This is how a lot, if not most, spam is sent. IMHO the spreading of virusses (viri?) also benifits from open relays. Spam is just anoying but benign... so in the end all ISP's will be closed relays using verification procedures. Bastiaan > There are a couple of groups that test and keep track of open > relays. ORBS is one of these, RSS is another. Some ISP's block > any e-mail from mailservers on these "real-time" lists of open > relays. > It seems that the mailserver ns.arachne.cz (212.24.129.58) found > itself on the ORBS list of open relays and was being blocked by > Clarence's ISP. When I checked last night, it had been removed > from the list and was being retested. > See http://www.mail-abuse.org/tsi/ and http://www.orbs.org/ . > Howard Eisenberger > Ottawa, Canada > -- > DOS TCP/IP * http://www.ncf.ca/~ag221/dosppp.html -- Arachne V1.61, NON-COMMERCIAL copy, http://arachne.cz/
