On 10/3/2012 4:30 PM, Steffen Schebesta wrote: > Thanks for all the insightful answers. > > So, I actually use the long_queue_ids options and I save the queue_ids to a > database to later compare them to the queue_ids found in the mail log to > parse and mark the bounces. > The problem - and thus the source for my question - is that this always > means a string compare in the database search which is aweful for > performance. > So my thought was, to always pass a unique Message-ID to postfix equal to > the autoincrement ID in my database, and then set this Message-ID as the > mail's queue_id. > This way the lookup in the database would be much faster plus I wouldn't > have to save the queue_id in the database in the first place (huge > performance boost). > In my case I can guarantee that the Message-ID is always passed and that it > is unique, so that wouldn't be the problem. But if Postfix creates the queue > file name before receiving the message content then it actually is a bigger > problem than I thought, except if I could change the queue_id or append the > id to the queue_id... > > If that doesn't work though then maybe I could work around this problem. I > thought about adding the message-id to the bounce message but that probably > won't work because the message-id would not be in Postfix anymore at the > time the bounce happens.
What's the end game here, what is it you're trying to accomplish? One sentence in plain English please, the 10,000 ft overview. E.g. "I want to do X" where X is 20 words or less. -- Stan > Any other options that I could try? > > Really appreciate your help here! > > Best, Steffen > > -----Ursprüngliche Nachricht----- > Von: owner-postfix-us...@postfix.org > [mailto:owner-postfix-us...@postfix.org] Im Auftrag von Wietse Venema > Gesendet: Mittwoch, 3. Oktober 2012 18:47 > An: Postfix users > Betreff: Re: How to change queue id? > > Steffen Schebesta: >> Hello everybody, >> >> I deliver mails to my Postfix through smtpd. Postfix then takes it and >> sends it out to the recipient. >> >> Now I'm trying to change the queue_id for each email in Postfix 2.9 >> source code so that it is equal to the Message-ID (it is unique, don't >> worry) that I set in the email header when passing the email to Postfix > through smtpd. >> I've looked in the source code for hours but cannot find the first >> time queue_id is set. >> >> In smtpd.c that (in my understanding) handles incoming mail through >> smtpd the variable state->queue_id is already used and only read but not > written. >> >> I would really appreciate any tips where I can find the initial >> setting and on how I can set state->queue_id to Message-ID > > Reasons not to use the message-id as the queue file name: > > - Different messages may contain the same Message-ID value. > > - Some messages don't contain a Message-ID. This field is not > required by current RFC documents. > > - Chicken-and-egg problem: Postfix chooses the queue file name (and > creates the file) before it receives the message content. > > I suggest that you set "enable_long_queue_ids = yes". Long queue ID strings > don't repeat as long as your clock moves forward. > > Wietse >
