| Author |
Message |
chriske911
Guest
|
 Posted:
Fri May 13, 2005 9:55 pm Post subject:
political mail issues |
|
|
I have a problem where I have 2 sites on both european and american
continent
each site has an exchange server
offcourse being just one AD domain there is always one mail server
possible as highest priority mx record
creating subdomains would be the answer for both sites to have a
default high priority XC server
management doesn't want a subdomain suffix in the email adresses
is there a way to redirect mailboxes to the correct subdomain with the
help of DNS records?
or anther way that customers only need to use someone@company.com
instead of someone@eu.company.com?
thnx
--
just a suggestion:
http://home.in.tum.de/~jain/software/oe-quotefix/
d;-p
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Al Mulnick
Guest
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| Posted:
Sat May 14, 2005 12:03 am Post subject:
Re: political mail issues |
|
|
Yes, there is another way called a smart host.
However, that may not meet all of your needs. Consider a company such as,
oh, Microsoft. They have one domain name microsoft.com. Several equally
costed MX records.
microsoft.com MX preference = 10, mail exchanger = mailb.microsoft.com
microsoft.com MX preference = 10, mail exchanger = mailc.microsoft.com
microsoft.com MX preference = 10, mail exchanger = maila.microsoft.com
Do all of those have to be in the same location? Or country? Or continent?
Nope. But, and this is a big consideration, once one of those mailers has
the message, it must be able to 'deliver or die'. What I mean by that is
that if it accepts the message, by SMTP rules it now must deliver it to the
next host. That next host could be local (geographically speaking) or it
could be around the world. The next host could be another SMTP mailer or it
could be the users mail store.
I'm going to make an assumption that once on your network, you don't want to
burn up the WAN link between Europe and America.
So to make this work the way you are describing, I would personally prefer a
smart host vs. an Exchange server, deployed in Europe and America. Both
smarthosts would know the location and have routes to the final destination
servers. That route could be a subdomain (that you register with external
DNS. I.E. us.company.com and europeancountry.company.com). To make this
work, the smarthost would have to know the information required for routing.
If it gets a piece of mail for US_User@company.com it would look that up in
it's directory, rewrite the delivery address, and then deliver it to the
appropriate mailer via the internet. That would look like
US_user@company.com -->change to US_user@us.company.com and then send it to
the appropriate mailer.
That's valid if you don't want the traffic to route over your wan keeping in
mind that all users send as user@company.com regardless of location.
Using DNS alone wouldn't do this because DNS doesn't have enough information
to route your mail appropriately.
If you need more details, feel free to contact offline.
Al
"chriske911" <chriske911@yaghoo.com> wrote in message
news:mn.6c6f7d55c47823d0.32006@yaghoo.com...
| Quote: | I have a problem where I have 2 sites on both european and american
continent
each site has an exchange server
offcourse being just one AD domain there is always one mail server
possible as highest priority mx record
creating subdomains would be the answer for both sites to have a default
high priority XC server
management doesn't want a subdomain suffix in the email adresses
is there a way to redirect mailboxes to the correct subdomain with the
help of DNS records?
or anther way that customers only need to use someone@company.com instead
of someone@eu.company.com?
thnx
--
just a suggestion:
http://home.in.tum.de/~jain/software/oe-quotefix/
d;-p
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Kevin D. Goodknecht Sr. [
Guest
|
| Posted:
Sat May 14, 2005 4:19 am Post subject:
Re: political mail issues |
|
|
In news:mn.6c6f7d55c47823d0.32006@yaghoo.com,
chriske911 <chriske911@yaghoo.com> posted this:
| Quote: | I have a problem where I have 2 sites on both european and american
continent
each site has an exchange server
offcourse being just one AD domain there is always one mail server
possible as highest priority mx record
creating subdomains would be the answer for both sites to have a
default high priority XC server
management doesn't want a subdomain suffix in the email adresses
is there a way to redirect mailboxes to the correct subdomain with the
help of DNS records?
or anther way that customers only need to use someone@company.com
instead of someone@eu.company.com?
|
Not with DNS records.
Exchange will send mail for unresolved recipients to another mail server(the
other Exchange server in this case) but this can pose a problem for
recipients that don't exist on either server, so it will loop between the
two servers I think something like four or five times and will increase
network activity between the servers. But, it is easy to set up, on the SMTP
virtual server properties, Messages tab "Forward all mail with unresolved
recipients to host:" with the other Exchange server name. Then you can use
the someone@company.com format with MX records with equal prioity.
I agree with Al, a Smart Host would be great, and could direct the mail to
the correct mail server. The drawback to a smart host is, it requires extra
administration because the email address will have to be configured in the
smart host in addition to the Exchange server.
--
Best regards,
Kevin D4 Dad Goodknecht Sr. [MVP]
Hope This Helps
===================================
When responding to posts, please "Reply to Group"
via your newsreader so that others may learn and
benefit from your issue, to respond directly to
me remove the nospam. from my email address.
===================================
http://www.lonestaramerica.com/
===================================
Use Outlook Express?... Get OE_Quotefix:
It will strip signature out and more
http://home.in.tum.de/~jain/software/oe-quotefix/
===================================
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with OEBackup:
http://www.oehelp.com/OEBackup/Default.aspx
===================================
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chriske911
Guest
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| Posted:
Sun May 15, 2005 12:16 pm Post subject:
Re: political mail issues |
|
|
Al Mulnick wrote on 13/05/2005 :
| Quote: | Yes, there is another way called a smart host.
However, that may not meet all of your needs. Consider a company such as,
oh, Microsoft. They have one domain name microsoft.com. Several equally
costed MX records.
microsoft.com MX preference = 10, mail exchanger = mailb.microsoft.com
microsoft.com MX preference = 10, mail exchanger = mailc.microsoft.com
microsoft.com MX preference = 10, mail exchanger = maila.microsoft.com
Do all of those have to be in the same location? Or country? Or continent?
Nope. But, and this is a big consideration, once one of those mailers has
the message, it must be able to 'deliver or die'. What I mean by that is
that if it accepts the message, by SMTP rules it now must deliver it to the
next host. That next host could be local (geographically speaking) or it
could be around the world. The next host could be another SMTP mailer or it
could be the users mail store.
I'm going to make an assumption that once on your network, you don't want to
burn up the WAN link between Europe and America.
So to make this work the way you are describing, I would personally prefer a
smart host vs. an Exchange server, deployed in Europe and America. Both
smarthosts would know the location and have routes to the final destination
servers. That route could be a subdomain (that you register with external
DNS. I.E. us.company.com and europeancountry.company.com). To make this
work, the smarthost would have to know the information required for routing.
If it gets a piece of mail for US_User@company.com it would look that up in
it's directory, rewrite the delivery address, and then deliver it to the
appropriate mailer via the internet. That would look like
US_user@company.com -->change to US_user@us.company.com and then send it to
the appropriate mailer.
That's valid if you don't want the traffic to route over your wan keeping in
mind that all users send as user@company.com regardless of location.
Using DNS alone wouldn't do this because DNS doesn't have enough information
to route your mail appropriately.
If you need more details, feel free to contact offline.
Al
"chriske911" <chriske911@yaghoo.com> wrote in message
news:mn.6c6f7d55c47823d0.32006@yaghoo.com...
I have a problem where I have 2 sites on both european and american
continent
each site has an exchange server
offcourse being just one AD domain there is always one mail server possible
as highest priority mx record
creating subdomains would be the answer for both sites to have a default
high priority XC server
management doesn't want a subdomain suffix in the email adresses
is there a way to redirect mailboxes to the correct subdomain with the help
of DNS records?
or anther way that customers only need to use someone@company.com instead
of someone@eu.company.com?
thnx
-- just a suggestion:
http://home.in.tum.de/~jain/software/oe-quotefix/
d;-p
|
that's what I came up with too
a sort of mail front server for routing to the correct back end servers
hosting just one of those at an ISP somewhere in te world would do it
for us
there are only about 250 employees worldwide
but I thought of a kind of redirection using DNS mailbox records or
something like that
off course it would make things more complicated
since every change would have to be followed by a manual or half
automatic DNS update
but indeed, the external mail routing is taking up a lot of bandwidth
of our WAN link
I don't really care if it's internal mail cause that's the way it has
to work
but for mail coming from outside it could be avoided
simply by implementing sub domains but that's not flying with
management
and offcourse they are right by saying it would complicate matters for
our customers
that's why the elaborate setup for something so simple
what exactly do you mean by smart host?
a mail server of any kind wich does relaying or something else
entirely?
thnx
--
just a suggestion:
http://home.in.tum.de/~jain/software/oe-quotefix/
d;-p |
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Al Mulnick
Guest
|
| Posted:
Sun May 15, 2005 7:06 pm Post subject:
Re: political mail issues |
|
|
A smarthost is a mail routing host that is smart enough to know mail stores
and routes and can match up mail with the stores via the appropriate route.
It's often deployed in situations very similar to this one where I need to
accept mail for one domain and properly rewrite the destination and send it
along the most appropriate route to it's final mail store.
Using DNS records would be cumbersome and is not often used. Not sure how
many mailers would even look at those records to be honest and it would
likely break up some of the efficiencies of the sending host.
Downside to smarthosts are that you have extra hops in the path and extra
hardware as well as some sort of method to update those smarthosts.
FWIW, your wan link doesn't need to be taken up with email. You could route
all of your email via Internet if you wanted. Might make a smart host
uneccessary as well, but you'd have to check into that and decide. I'd
likely want to use some sort of transport encryption if I went that route
(TLS?)
Just a thought,
Al
"chriske911" <chriske911@yaghoo.com> wrote in message
news:mn.7a2c7d55f6b06dd3.32006@yaghoo.com...
| Quote: | Al Mulnick wrote on 13/05/2005 :
Yes, there is another way called a smart host.
However, that may not meet all of your needs. Consider a company such
as, oh, Microsoft. They have one domain name microsoft.com. Several
equally costed MX records.
microsoft.com MX preference = 10, mail exchanger = mailb.microsoft.com
microsoft.com MX preference = 10, mail exchanger = mailc.microsoft.com
microsoft.com MX preference = 10, mail exchanger = maila.microsoft.com
Do all of those have to be in the same location? Or country? Or
continent? Nope. But, and this is a big consideration, once one of those
mailers has the message, it must be able to 'deliver or die'. What I
mean by that is that if it accepts the message, by SMTP rules it now must
deliver it to the next host. That next host could be local
(geographically speaking) or it could be around the world. The next host
could be another SMTP mailer or it could be the users mail store.
I'm going to make an assumption that once on your network, you don't want
to burn up the WAN link between Europe and America.
So to make this work the way you are describing, I would personally
prefer a smart host vs. an Exchange server, deployed in Europe and
America. Both smarthosts would know the location and have routes to the
final destination servers. That route could be a subdomain (that you
register with external DNS. I.E. us.company.com and
europeancountry.company.com). To make this work, the smarthost would
have to know the information required for routing. If it gets a piece of
mail for US_User@company.com it would look that up in it's directory,
rewrite the delivery address, and then deliver it to the appropriate
mailer via the internet. That would look like
US_user@company.com -->change to US_user@us.company.com and then send it
to the appropriate mailer.
That's valid if you don't want the traffic to route over your wan keeping
in mind that all users send as user@company.com regardless of location.
Using DNS alone wouldn't do this because DNS doesn't have enough
information to route your mail appropriately.
If you need more details, feel free to contact offline.
Al
"chriske911" <chriske911@yaghoo.com> wrote in message
news:mn.6c6f7d55c47823d0.32006@yaghoo.com...
I have a problem where I have 2 sites on both european and american
continent
each site has an exchange server
offcourse being just one AD domain there is always one mail server
possible as highest priority mx record
creating subdomains would be the answer for both sites to have a default
high priority XC server
management doesn't want a subdomain suffix in the email adresses
is there a way to redirect mailboxes to the correct subdomain with the
help of DNS records?
or anther way that customers only need to use someone@company.com
instead of someone@eu.company.com?
thnx
-- just a suggestion:
http://home.in.tum.de/~jain/software/oe-quotefix/
d;-p
that's what I came up with too
a sort of mail front server for routing to the correct back end servers
hosting just one of those at an ISP somewhere in te world would do it for
us
there are only about 250 employees worldwide
but I thought of a kind of redirection using DNS mailbox records or
something like that
off course it would make things more complicated
since every change would have to be followed by a manual or half automatic
DNS update
but indeed, the external mail routing is taking up a lot of bandwidth of
our WAN link
I don't really care if it's internal mail cause that's the way it has to
work
but for mail coming from outside it could be avoided
simply by implementing sub domains but that's not flying with management
and offcourse they are right by saying it would complicate matters for our
customers
that's why the elaborate setup for something so simple
what exactly do you mean by smart host?
a mail server of any kind wich does relaying or something else entirely?
thnx
--
just a suggestion:
http://home.in.tum.de/~jain/software/oe-quotefix/
d;-p
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