If you deliver more than a few emails to the outside world, especially if a good portion of those go to Yahoo, you may want to read this message: http://marc.info/?l=postfix-users&m=127689518629249&w=2 Actually, read the whole thread, it's interesting and the discussion still continues: http://marc.info/?t=127619611600001&r=1&w=2 TLDR: The 2.3.3 Postfix version that comes with RH / CentOS 5 doesn't do delivery rate control very well and has a habit of annoying some email providers. A simple upgrade from 2.3.3 to 2.7.0, no config changes, can improve delivery rate by 50% in some cases (e.g. if you deliver thousands of emails to Yahoo). With config changes, the improvement might be even bigger. Fun fact: Postfix-2.3.3 has been released in August 2006. Think about that. -- Florin Andrei http://florin.myip.org/
On Fri, Jun 18, 2010 at 02:28:36PM -0700, Florin Andrei wrote:> Fun fact: Postfix-2.3.3 has been released in August 2006. Think about that.To be fair, RH/CentOS also ships with Sendmail-8.13.8, also from August 2006. What a golden month for mail daemons that was. The door's wide open for someone with the energy to put together a server distro based on CentOS but with modern versions of essential daemons. Yes, it wouldn't inherit certification from commercial software vendors who now spec RH/CentOS. But major daemons like Postfix and Sendmail are very well tested in tens of thousands of deployments in versions not over a year old (which are significantly superior to versions from 2006, no matter how much backporting of new features RH might have done meanwhile). They should be stock in any current distro. It used to be that RH's advantage was its daemons weren't as crufty as Debian stable. But now with Ubuntu's server version solid - not nearly as well supported by the user community as CentOS, but quite current in its major daemon versions - those who want there to be good, widely used distros in the RH mold five years out from now would do well to push ahead of RH in the server space. Some sort of a CentOS+, unbound from RH's laggard ways, but conservative in its stability, could find itself quite welcome in the world. Is anyone working on this? (No, not Fedora. That's not a server OS.) Whit
On 18/06/2010 22:28, Florin Andrei wrote:> Fun fact: Postfix-2.3.3 has been released in August 2006. Think about that.While you are doing that - also think about this : Red Hat have a policy, and they stick with it. Its something that works well for them, the ISVs around the base and its something that works for us. We have a policy too, but our policy is split into 2 segments. 1) Stick as close to upstream as possible for the main distro. 2) Its about the users and use cases. Which is unlike Red Hat's cause - where its about a supportable base, with some level of assurance passing through to the users about what level of support they can get when they call a phone number. You dont get that with CentOS - but what you do get is something like this : - Step up and offer to maintain ( which would mean taking responsibility for ) a newer postfix package in CentOSPlus for CentOS-4 and 5 ( Not sure if 3 is worth doing now ). And there will be @centos.org people who would gladly help you along the process and facilitate it. - KB