On Jan 20, 2010, at 9:28 PM, Victor Duchovni wrote: > On Wed, Jan 20, 2010 at 03:22:56PM -0500, Wietse Venema wrote: > >> The broken router then throws away the bytes with higher sequence >> numbers than 14233. >> >> Workaround: turn off window scaling support on the sender's kernel. > > This problem is sufficiently common, that on Linux MTAs I always add: > > net.ipv4.tcp_window_scaling = 0 I'm running Solaris 10 x86 and I did
sudo ndd -set /dev/tcp tcp_wscale_always 0 before I did this the value was 1. After I did this I flushed the queue but the messages stay stuck in the queue with the same problem. I'm not sure this is the right kernel parameter for Solaris? /etc/system has no specific setting for tcp, so everything is default Solaris 10. Wietse, the broken router you mentioned, could that be a Cisco PIX on the receivers site? Jan 20 22:58:43 stevie.youngguns.nl postfix/smtp[18765]: [ID 197553 mail.info] 8A5553BA0C: enabling PIX workarounds: disable_esmtp delay_dotcrlf for mx2.amsterdam.nl[145.222.14.10]:25 Thanks, Martijn > > to sysctl.conf. Adjust for other systems as necessary. This hurts > long-haul throughput, but email tolerates latency, provided most of your > outbound traffic is not a high-bandwidth channel to Mars (but then you > would not be using TCP anyway...) > > -- > Viktor. > > Disclaimer: off-list followups get on-list replies or get ignored. > Please do not ignore the "Reply-To" header. > > To unsubscribe from the postfix-users list, visit > http://www.postfix.org/lists.html or click the link below: > <mailto:majord...@postfix.org?body=unsubscribe%20postfix-users> > > If my response solves your problem, the best way to thank me is to not > send an "it worked, thanks" follow-up. If you must respond, please put > "It worked, thanks" in the "Subject" so I can delete these quickly. >
