Sloan wrote: > Sandy Drobic wrote: >> When I started learning about MTAs I tried to understand Sendmail and gave >> up when even the documentation and how-tos sounded like so much gibberish >> to me. Postfix on the other hand is documented very accurately. How long >> did it take you to get a grip on the basics of QMail? >> > Oh, our "look" at qmail was much more high level, we didn't invest the > time required to get a grip on it. It was research, and then saying for > each of our main functions "OK, we do this in sendmail, how can we > accomplish the same thing in qmail?"
Nice. I wish I had the time to do that as well. (^-^) What were the features that differed the most in implementation or performance? >>> details we didn't like - mail queue files were referenced by inode >>> number, so if we ever had to recover from a disaster, guess what? >>> different inode numbers, and we're hosed. Also, we had thousands of >>> aliases and redirects which change daily - postfix and sendmail easily >>> handle this, but qmail seemed a bit more awkward to configure. >>> >> How were the lookups done, LDAP/SQL or flat files? What were the symptoms? >> > Lookups are done from local db files for optimum speed. The files are > updated several times a day with automated scripts, but we need our mail > gateways to be blazing fast, so the potential delay in waiting for ldap > response from a remote lotus notes server running on windoze was > unacceptable to us. Now that notes is being moved off of windoze and > onto a p-series running AIX we may revisit that, but the current system > works well. Our domino servers are still running on windows. I am also using a script to extract all valid recipients with ldap lookups. Even for a relative low volume site as our company I decided to stay with the script instead of direct ldap lookups. I didn't have a reason yet to stress test the ldap server, and with postfix in front of the domino servers I probably never will. >> Yes, Postfix as well as QMail were developed out of need for secure MTAs, >> as I just read on http://cr.yp.to/qmail.html. Wietse does take care not to >> introduce features that waste resources. Probably one of the reasons whey >> Suse changed to Postfix as the default MTA. >> >> Thanks for the view of a (previous) Sendmail user. Did you have a look at >> Exim as well? When I took a casual look at their documentation it seemed >> quite nice. >> > > We looked at exim, and it seemed to have some nice features - but we > need to get the maximum mail throughput and minimum latency possib;e, > and postfix was far and away the performance winner. BTW in researching > benchmark results, I was unable to find any evidence of qmail's > purported performance advantages over sendmail. I would also like to see some test results done on the same hardware and the same base of testmails. -- Sandy List replies only please! Please address PMs to: news-reply2 (@) japantest (.) homelinux (.) com -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
