MX choosing

2011-07-22 Thread Feng He
Given the MX hosts for sympatico.ca domain: $ dig sympatico.ca mx +short 5 mxmta.sympatico.ca. $ dig mxmta.sympatico.ca +short 67.69.240.17 67.69.240.24 67.69.240.22 67.69.240.23 67.69.240.21 67.69.240.20 67.69.240.19 67.69.240.18 when the peer MTA fail to talk to one of these hosts,will it try

Re: MX choosing

2011-07-22 Thread Matus UHLAR - fantomas
On 22.07.11 16:50, Feng He wrote: Given the MX hosts for sympatico.ca domain: $ dig sympatico.ca mx +short 5 mxmta.sympatico.ca. $ dig mxmta.sympatico.ca +short 67.69.240.17 67.69.240.24 67.69.240.22 67.69.240.23 67.69.240.21 67.69.240.20 67.69.240.19 67.69.240.18 when the peer MTA fail to ta

Re: MX choosing

2011-07-22 Thread Phil Mayers
On 07/22/2011 09:50 AM, Feng He wrote: Given the MX hosts for sympatico.ca domain: $ dig sympatico.ca mx +short 5 mxmta.sympatico.ca. $ dig mxmta.sympatico.ca +short 67.69.240.17 67.69.240.24 67.69.240.22 67.69.240.23 67.69.240.21 67.69.240.20 67.69.240.19 67.69.240.18 when the peer MTA fail

Re: MX choosing

2011-07-22 Thread Torsten Segner
Am Fri, 22 Jul 2011 16:50:35 +0800 schrieb Feng He : > Given the MX hosts for sympatico.ca domain: > > $ dig sympatico.ca mx +short > 5 mxmta.sympatico.ca. > > $ dig mxmta.sympatico.ca +short > 67.69.240.17 > 67.69.240.24 > 67.69.240.22 > 67.69.240.23 > 67.69.240.21 > 67.69.240.20 > 67.69.240.19

Re: MX choosing

2011-07-22 Thread Feng He
Thanks. this is the description: When the lookup succeeds, the mapping can result in a list of alternative delivery addresses rather than a single address, because of multiple MX records, multihoming, or both. To provide reliable mail transmission, the SMTP client MUST be able to try

Re: MX choosing

2011-07-22 Thread Tony Finch
Phil Mayers wrote: > On 07/22/2011 09:50 AM, Feng He wrote: > > > > Given the MX hosts for sympatico.ca domain: > > > > $ dig sympatico.ca mx +short > > 5 mxmta.sympatico.ca. > > > > $ dig mxmta.sympatico.ca +short > > 67.69.240.17 [ and several others ] > > > > when the peer MTA fail to talk to o

Re: DNS Caching Issue

2011-07-22 Thread Paul Ooi Cong Jen
What is the Caching issue are you facing. Bind should cache according to TTL. Other than that I do not see much problem from Bind. -- Paul Ooi http://systems.takizo.com On Jul 22, 2011, at 6:02 AM, Sathyan Arjunan (sarjunan) [CONTRACTOR] wrote: > Recent days, I am facing frequent caching issue

Re: MX choosing

2011-07-22 Thread Feng He
On Fri, Jul 22, 2011 at 5:58 PM, Tony Finch wrote: > >  The question of whether a sender should attempt retries using the >  different addresses of a multihomed host has been controversial. The >  main argument for using the multiple addresses is that it maximizes the >  probability of timely del

Re: MX choosing

2011-07-22 Thread Phil Mayers
On 22/07/11 14:01, Feng He wrote: On Fri, Jul 22, 2011 at 5:58 PM, Tony Finch wrote: The question of whether a sender should attempt retries using the different addresses of a multihomed host has been controversial. The main argument for using the multiple addresses is that it maximizes

Re: MX choosing

2011-07-22 Thread G.W. Haywood
Hi there, On Fri, 22 Jul 2011 Tony Finch quoted the RFCs thus: > The question of whether a sender should attempt retries using the > different addresses of a multihomed host has been controversial. ... I know of at least one substantial organization which uses this kind of thing as part of its