Thanks for the information Simon. We currently use Postini for inbound mail and will look into routing out via Postini, if there isn't an additional cost. Since I haven't routed out to a service like this, would be like setting up an authenticated smarthost to this service for outbound mail ?
The information on the DAG could prove very helpful since we plan to move in that direction within 6 months. Harry On Fri, Aug 12, 2011 at 8:13 AM, Simon Butler <si...@sembee.co.uk> wrote: > PTR should be 1:1 mapping to a host name. Anything else isn’t going to > provide reliable results. > If you want to use multiple connections, then one option would be to route > email out through an ISP neutral service, so it doesn’t matter how it gets > there. This is what I do for myself and a few of my clients. Email is routed > out through a server that lives in a data centre (which also hosts web > sites, monitoring etc). You could also use a third party anti-spam service, > one of the mail hop services etc. **** > > ** ** > > A DAG has nothing to do with this scenario because it is just protecting > the data. You could do something with two servers only, as the DAG can live > on the same server as the CAS and Hub Transport roles. **** > > While on the subject of a DAG, if you are even considering the option of > putting in a DAG at any point in the future, configure a CAS array host name > and configuration in the server. This will make the implementation of the > DAG much more straight forward. CAS array implementation is much easier if > done early than trying to retro fit it when the server has been in > production a little while with many users connected.**** > > ** ** > > Simon. **** > > ** ** > > ** ** > > -- > Simon Butler > MVP: Exchange, MCSE > Sembee Ltd. > > e: si...@sembee.co.uk > w: http://www.sembee.co.uk/ > w: http://exchange.sembee.info/**** > > w: http://blog.sembee.co.uk/ > > Need cheap certificates for Exchange, compatible with the iPhone? > http://CertificatesForExchange.com/ <http://certificatesforexchange.com/>for > certificates from just $26.99. > Need a domain for your certificate? > http://DomainsForExchange.net/<http://domainsforexchange.net/> > **** > > ** ** > > Exchange Resources: http://exbpa.com/ **** > > ** ** > > ** ** > > ** ** > > *From:* Harry Singh [mailto:hbo...@gmail.com] > *Sent:* 12 August 2011 12:52 > *To:* MS-Exchange Admin Issues > *Subject:* PTR Sanity Check and Failover**** > > ** ** > > All - > > Is it RFC Compliant or looked down upon by Anti-SPAM vendors to assign > different IP's to the same host name for PTR records? > > I'm working on documenting soft failover scenarios when the primary ISP > link goes down temporarily and all traffic is routed through a backup ISP > link. > > A separate thought, should the above not be recommended, is to possibly > create two CAS servers that are NAT'd to different Public IP's but connected > to the same MBX server. I'm curious to see how other folks prepare for this > type of scenario. > > I haven't considered a DAG yet because of the amount of resources in > involved. > > Cheers, > > Harry. **** > > --- > To manage subscriptions click here: > http://lyris.sunbelt-software.com/read/my_forums/ > or send an email to listmana...@lyris.sunbeltsoftware.com > with the body: unsubscribe exchangelist**** > > --- > To manage subscriptions click here: > http://lyris.sunbelt-software.com/read/my_forums/ > or send an email to listmana...@lyris.sunbeltsoftware.com > with the body: unsubscribe exchangelist > --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
