-----BEGIN PGP SIGNED MESSAGE----- Dear Jonathan,
On 17:31 19.03.2003, you [Jonathan Angliss] wrote... > Right... but it's not DSL... and what happens with addresses that > don't reverse? The spam filters would be useless. MTA-issued error "451 Temporary lookup failure, try again later". > No... but you can insert extra header lines... and that was what I was > talking about... What part does the filter pick up on, the first line > to report a receive, or the last one. The "filter" is at the TCP/IP level, before any kind of header or body hits the line. The header or body is basically unrelated. > Ahh... I see... I thought you were talking about a client side filter. Server side. Client-side spam filtering is, mhhh how to tell dipomatically, well you already downloaded the junk so your "harm" has already been done. ;) > That is of course in-effective when the mail is being received from > another mail server. Which is normally the case in most situations as > spammers fire emails through open relays. Of course, if people knew Blocking open relays is the birth of all those RBLs. Plus, BTW, an MTA can do sender verification "callout", meaning before accepting a RCPT, it opens a connection to the MX of the supplied MAIL From:<address> to see if this address exists and can accept mail. Cheers, Johannes mailto:[EMAIL PROTECTED] - -- I haven't lost my mind; I know exactly where I left it. -----BEGIN PGP SIGNATURE----- Version: PGP Cyber-Knights Templar build 6.5.8ckt09 Comment: Freiheit stirbt in kleinen Stuecken... Comment: KeyID: 0x73D62D41 Comment: Fingerprint: 69C0 50A1 C96A FF3F 3F09 6E91 F9B8 B727 iQEVAwUBPno/Zwt4MvNz1i1BAQF3bQf/UzXs737HHfnuLC1Kt4MoxOyOTnkWQUtJ smYAe9no2rnM/5rx0dnkhZFRAi9orbHv1AVMOUi2UmIiZ5YyuChD4qqWs4cs0r5C AvM+epLqvghxff5EYPBdcKrsoam9rh5xsgoKdku2Xm9rlSIAr6dZBEjeGPASz03n 5sNwxk2hB8DD0ahA/h9pBY+dXTIBGixnH6cDYmnHAPJlxqn266Hd2yx4kEiJ0Ugj GI46cVCgveY26PbtFcivsrcCwMCCY+jcMxEOe9ExTXK09+yesg0bI9Ok/cOBeLh1 dgTu2FtWrT3xcQXkxyE6ubefmI4WKDJ101n7lOHNYSyaaVDGYrDZxA== =T4Vr -----END PGP SIGNATURE----- ________________________________________________ Current version is 1.62 | "Using TBUDL" information: http://www.silverstones.com/thebat/TBUDLInfo.html
