Thanks for posting this follow-up, Chris. Your method of using aliases to combat spam seems like a good one to me. Now I just need to get off my duff and set up my own mail server... :-)
--Jeremy On Thu, 2003-08-21 at 09:45, Chris Merrill wrote: > I got an answer to this question on the Postfix mailing > list, so I thought I'd repeat it here: > > Starting somewhere in the 2.0 tree, Postfix adds the information > I needed (the address that a message was destined for, prior > to being 'de-aliased') is now contained in two places: > - a header is added to the message "X-Original-To" that contains > the original address > - the original address is included in the mail log entry when the > message is received: "orig_to=<[EMAIL PROTECTED]>" > > Chris > > Chris Merrill wrote: > > A little background: > > I'm using the postfix aliases file as a sort of "whitelist" filter for > > spam. All the aliases refer to a username that I have never given out. > > It's sorta the 'master' destination for my e-mail. > > Key to this scheme is that when I get spam, I look to see which address > > it came to and delete the alias. Future messages to that address get > > bounced. > > > > Of course, many spammers don't address the "To:" field correctly, so I was > > relying on the "Delivered-To:" field that is apparently added by Postfix. > > However, it seems to report the address _after_ it's been resolved against > > the alias file. Even in the log file, it reports the resolved address, > > rather than the original address: > > > > Aug 6 11:42:55 christophermerrill postfix/smtpd[9164]: connect from > > ms-smtp-02.southeast.rr.com[24.93.67.83] > > Aug 6 11:42:55 christophermerrill postfix/smtpd[9164]: EE0DB73B78: > > client=ms-smtp-02.southeast.rr.com[24.93.67.83] > > Aug 6 11:42:56 christophermerrill postfix/cleanup[9165]: EE0DB73B78: > > message-id=<[EMAIL PROTECTED]> > > Aug 6 11:42:56 christophermerrill postfix/nqmgr[9101]: EE0DB73B78: > > from=<[EMAIL PROTECTED]>, size=981, nrcpt=1 (queue active) > > Aug 6 11:42:56 christophermerrill postfix/smtpd[9164]: disconnect from > > ms-smtp-02.southeast.rr.com[24.93.67.83] > > Aug 6 11:42:56 christophermerrill postfix/local[9169]: EE0DB73B78: > > to=<[EMAIL PROTECTED]>, relay=local, delay=1, status=sent > > (mailbox) > > > > > > Does anyone know of a configuration setting to change this behavior? > > Or any other way to figure out who a message was originally destined for? > > > > TIA, > > Chris > > > > > -- > ********************************* > Chris Merrill > [EMAIL PROTECTED] > ********************************* -- /---------------------------------------------------------------------\ | Jeremy Portzer [EMAIL PROTECTED] trilug.org/~jeremy | | GPG Fingerprint: 712D 77C7 AB2D 2130 989F E135 6F9F F7BC CC1A 7B92 | \---------------------------------------------------------------------/
signature.asc
Description: This is a digitally signed message part
-- TriLUG mailing list : http://www.trilug.org/mailman/listinfo/trilug TriLUG Organizational FAQ : http://trilug.org/faq/ TriLUG Member Services FAQ : http://members.trilug.org/services_faq/ TriLUG PGP Keyring : http://trilug.org/~chrish/trilug.asc
