At 8:08 PM -0500 2003/01/18, Kutulu wrote:
I think the closest that postfix has for the sendmail "host status" feature is the fast_flush_domains parameter, but this is normally only used for those domains that you will be acting as a backup MX/relay host and only works in conjunction with the ETRN command.I was just concerned that some useful task that used to occur nightly may now not be occurring, and if so, what I could do to make it occur again. I didn't see anything to even indicate that postfix has a host status cache, meaning the option is pretty pointless either way. I was just wondering if anyone who had run postfix longer than me knew for sure :)
With sendmail, IIRC you can use the host status information both for domains that you act as a backup MX for, as well as for domains that you do a lot of e-mail with. Therefore, they don't quite serve the same function.
The fast_flush_domains feature is something Wietse added after several people (myself included) complained that there was no easy way to do the equivalent of a "sendmail -qRdomain.com", either from the command-line or via the ETRN command. Instead, he used to just flush the entire queue.
Imagine you're an ISP running a backup MX for tens of thousands or hundreds of thousands of clients, and you see an average of 5-10 ETRN commands per second. Then think about trying to flush the entire queue each time you get an ETRN.
Of course, postfix has built-in methods of restricting the number of SMTP clients that can be attempting to deliver mail to any given user or domain, so it has less of a need for something like a HostStatusDirectory.
My understanding is that the fast_flush_domains stuff works through having the system log data related to the $relay_domains parameter in a certain way so that you can keep track of which file/message is bound for which recipient domain(s), and so that you can then figure out which files need to be flushed when you get an ETRN.
I don't think there's a way to flush this feature in postfix, short of stopping and starting the service.
However, I'll have to check the latest source code to be sure.
--
Brad Knowles, <[EMAIL PROTECTED]>
"They that can give up essential liberty to obtain a little temporary
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-Benjamin Franklin, Historical Review of Pennsylvania.
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