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Mac Forum / Applications / Eudora / April 2004Can Junk mail be filtered from body of messages?
Seems as though the settings only allow for subject, and sender info... which are easily forged. Thanks! > Seems as though the settings only allow for subject, and sender > info... which are easily forged. What software are you using? Eudora allows filtering on any of the headers or body, and if you're using the recent versions, the Junk mail filtering is bayesian.  SignatureKathy > > Seems as though the settings only allow for subject, and sender > > info... which are easily forged. > > What software are you using? Eudora allows filtering on any of the > headers or body, and if you're using the recent versions, the Junk mail > filtering is bayesian. Hello, Not exactly "any" you canot for example filter on the attachment Luc > > What software are you using? Eudora allows filtering on any of the > > headers or body... > > Not exactly "any" you canot for example filter on the attachment An attachment isn't any of the headers or body. SignatureMike Rosenberg <http://www.macconsult.com> Macintosh consulting services for NE <http://bogart-tribute.net> Tribute to Humphrey Bogart Ralph Nader: Unsafe at any speed > > > What software are you using? Eudora allows filtering on any of the > > > headers or body... > > > > Not exactly "any" you canot for example filter on the attachment > > An attachment isn't any of the headers or body. Mike, I'm not by far a RFC or Mail, or MIME or anything this kind specialist, byt it seems Content-type is part of the headers : http://www.dsv.su.se/~jpalme/ietf/ietf-mail-attributes.html Luc In article <1gcr8g0.eezt6011bkxb8N%luc_ENLEVER@saint-elie_CEMACHIN_.com>, > > > > What software are you using? Eudora allows filtering on any of the > > > > headers or body... [quoted text clipped - 9 lines] > > http://www.dsv.su.se/~jpalme/ietf/ietf-mail-attributes.html Correct, and if I am interpreting the contents of the UserJunkDB.txt file, Eudora's filters are indeed using all of the MIME headers to feed the filters. This is supported by the fact that Eudora has been doing a pretty good job in my mail of catching worm mail as Junk, even those varieties with little or no content other than an attached payload. SignatureNow where did I hide that website... > I'm not by far a RFC or Mail, or MIME or anything this kind specialist, > byt it seems Content-type is part of the headers : I'm embarrassed by my previous post. Of course you're right. Sorry for my mistake! SignatureMike Rosenberg <http://www.macconsult.com> Macintosh consulting services for NE <http://bogart-tribute.net> Tribute to Humphrey Bogart Ralph Nader: Unsafe at any speed > > > What software are you using? Eudora allows filtering on any of the > > > headers or body... > > > > Not exactly "any" you canot for example filter on the attachment > > An attachment isn't any of the headers or body. I do filter on attachments, although indirectly--use as criteria that the body contains ".pif" or ".scr" or ".exe" and that will catch most of the garbage with attachments. SignatureKathy >What software are you using? Eudora allows filtering on any of the >headers or body, and if you're using the recent versions, the Junk mail >filtering is bayesian. Is there any way of filtering on Bcc? That'd be nice. SignaturePeter > >What software are you using? Eudora allows filtering on any of the > >headers or body, and if you're using the recent versions, the Junk mail [quoted text clipped - 3 lines] > > That'd be nice. In theory no mail should ever arrive with a Bcc header present. You COULD filter based on the existence of any Bcc header and catch no mail that was handled by correctly-operating mail software. The 'Bcc' mechanism, when working properly, is handled entirely at the submission phase when the originating 'mail user agent' (for example, Eudora or Outlook) takes what the user has authored and puts it on the wire for the first time. The addresses in the Bcc header get stripped out of the message by the MUA and put in the SMTP envelope instead. By the time the message is actually transmitted, there is no Bcc header at all. The fact that headers do not control delivery is also noticeable in messages sent to legitimate mailing lists. The output of most such lists hit SMTP with a To header of the list submission address and a pile of addresses in the SMTP envelope, which is what determines where the message is delivered. The elements in the SMTP envelope are only present as part of the transport layer and are only seen by the SMTP servers handling delivery to those specific addresses. Generally you can detect messages not sent specifically to you by filtering on the presence of your email address in recipient headers. Having used Eudora continuously for the entire time that it has supported filtering, I have an absurd number of order-sensitive filters, and one of the last ones, after all the filters that move messages to special mailboxes dedicated to various lists I am subscribed to, is one that filters mail where <Any Recipient> does not contain "scconsult.com" and <Any Recipient> does not contain [another domain I receive mail in] into a mailbox called 'likely garbage'. By the time mail gets to that filter, all the mail to mailing lists I've subscribed to has already been diverted to various mailboxes, and what's left which is not addressed specifically to one of my addresses is either spam or something that someone has consciously Bcc'd to me. SignatureNow where did I hide that website... >In theory no mail should ever arrive with a Bcc header present. You >COULD filter based on the existence of any Bcc header and catch no mail >that was handled by correctly-operating mail software. Thanks for the explanation. I always thought that you couldn't filter directly on Bcc and now I know that was right- and why. Fortunately for me it's a small problem, not many hurt... SignaturePeter |
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