Perfect this is what I was talking about, now My IMAP and SMTP are on same server and confusion starts from there since MX records will eventaully should have A record as well so in that case I will be having 2 A records pointing to same IPs correct. Woudl that casue any issue, theortically it shouldnt.
example.com IN MX 10 mail.example.com example.com IN MX 20 mail01.example.com mail.example.com IN A 11.22.33.44 mail01.example.com IN A 55.66.77.88 imap.example.com IN A 11.22.33.44 imap.example.com IN A 55.66.77.88 On 12/14/12, Feng He <fen...@nsbeta.info> wrote: > δΊ 2012-12-14 17:14, Manish Rane ει: >> I understand that Mail Delivery load balance can be achieved by usingMX >> priorities. My concern is not that, rather I am more worries about users >> who will be using A record to configure their mail clients like IMAP or >> POP. I am thinking on load balancing their since I want users to access >> the both the ISPs to connect. I can have A/CNAME? record configured in >> my zone with *lower TTL value say 180* so that if any of the link goes >> down I can edit the zone and have the faulty entry removed which >> eventually would cost me less downtime. That way I dont need to do any >> configuration at client end since the A/CNAME record is gonna be the same. >> >> That is why I was wondering if A or CNAME can be configured for two >> different IP addresses which also holds MX Records and thus configure >> the load balancing by that way? > > There are two ways of setup that. > the first, for example, imap.example.com has two A records, > > imap.example.com. 900 IN A 11.22.33.44 > imap.example.com. 900 IN A 55.66.77.88 > > If one server go down, half of the users have the chance to use the > another one. > > the second, imap.example.com has only one A record, > > imap.example.com 900 IN A 11.22.33.44 > > when this server go down, you change the record value to another IP by > hand. that's no problem for the clients ,but you must do it by hand. Or > write a script to do this automatically for you. > > Regards. > _______________________________________________ > 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 -- -------------------------------------------------------------------------- Thanks and Regards, Manish R +91-9820319967 _______________________________________________ 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