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 (and retry) each of the relevant addresses in this list in order, until a delivery attempt succeeds. However, there MAY also be a configurable limit on the number of alternate addresses that can be tried. In any case, the SMTP client SHOULD try at least two addresses.
On Fri, Jul 22, 2011 at 5:11 PM, Matus UHLAR - fantomas <uh...@fantomas.sk> wrote: > 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 talk to one of these hosts,will it try the >> next one? or it just give up? > > this is out of DNS and BIND scope. > see rfc 5321, section 5.1 for MTA requirements. > -- > Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/ > Warning: I wish NOT to receive e-mail advertising to this address. > Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. > Saving Private Ryan... > Private Ryan exists. Overwrite? (Y/N) > _______________________________________________ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to > unsubscribe from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users > _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
