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Exim Relay Emails to optimize email send / recieve mechanism.

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mirfan1981 at gmail

Feb 10, 2012, 5:38 AM

Post #1 of 5 (387 views)
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Exim Relay Emails to optimize email send / recieve mechanism.

Hi,
We are using Exim MTA on dedicated server hosted on US data center with
CENTOS 5.
Our users are in two regions in US and China. Problem is that we have
connectivity issues from china to US DC and because of these china users
having difficulties for sending emails along with attachments most of the
time because of slow connectivity. Because china users have to connect to
US DC SMTP server and because of slow connectivity issues users suffers
alot.

Currently main mail server which hosts all users mailboxes. and i don't
want to separate domain name between two datacenters. I still think
separate SMTP server on both datacenters can solve email sending issues but
how to accomplish this without changing any user email domain e.g.
abc [at] example or any other idea ?

Actually when users from china tries to send email along with attachments
it takes quite some minutes infacts sometime quite long because end user
need to connect from china to US DC primary MTA and because of connectivity
and bandwidth issue users face problems. However, as i said earlier, we
also have machine in China DC and connectivity b/w china & US DC is much
better.
I want solution something like when user sends email from china by using
our domain @example.com it should connect China DC (we will install exim on
china DC machine if require) which will responsible to send email to US DC.
Also we don't want to switch china user mailboxes to China we need to keep
all user mailboxes to primary MTA.
Through this we will foresee email sending will speedup atleast.

Also I need to know how to do it to receive emails ?
Please let me how to accomplish this or any other solution?
--
## List details at https://lists.exim.org/mailman/listinfo/exim-users
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://wiki.exim.org/

jgh at wizmail

Feb 11, 2012, 7:57 AM

Post #2 of 5 (367 views)
Permalink

Re: Exim Relay Emails to optimize email send / recieve mechanism. [In reply to]

On 2012-02-10 13:38, Muhammad Irfan wrote:
> We are using Exim MTA on dedicated server hosted on US data center with
> CENTOS 5.
> Our users are in two regions in US and China.
[...]
> Because china users have to connect to
> US DC SMTP server and because of slow connectivity issues users suffers
> alot.

Put an SMTP service on your system in China for the local users there
to use to send outbound. Tell them the name (or IP) of the system to use.
Have them use AUTH, and have a local
copy of your user database there to verify the AUTH.

The system they use to send outbound via need have no connection
with the domain name of their account.

> Also we don't want to switch china user mailboxes to China we need to keep
> all user mailboxes to primary MTA.

Not sure why not, but it's a separable issue from the outbound.

> Through this we will foresee email sending will speedup atleast.

The users should see better response - but there will still be delays
in getting the mails delivered from that system to wherever they're going.

>
> Also I need to know how to do it to receive emails ?

Have your user-database know where each user wants their mail (US or China).
Look that up in the routers, and deliver to file (if on the correct machine already)
or by smtp to the alternate machine.

Tell your users what name (or IP) of system to use for retrieving their mail.
Run IMAP services on both your systems. POP also, if you must, and a webmail
if you wish.

Both systems need to accept mail for your domain. It's probably simplest
to keep your US system named in DNS as the primary MX for your domain

--
Jeremy

--
## List details at https://lists.exim.org/mailman/listinfo/exim-users
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://wiki.exim.org/

mirfan1981 at gmail

Feb 12, 2012, 9:28 PM

Post #3 of 5 (360 views)
Permalink

Re: Exim Relay Emails to optimize email send / recieve mechanism. [In reply to]

We are using Exim MTA on dedicated server hosted on US data center with
CENTOS 5.
Our users are in two regions in US and China.

[...]

Because china users have to connect to
US DC SMTP server and because of slow connectivity issues users suffers
alot.

>> Put an SMTP service on your system in China for the local users there
to use to send outbound. Tell them the name (or IP) of the system to use.
Have them use AUTH, and have a local
copy of your user database there to verify the AUTH.
The system they use to send outbound via need have no connection
with the domain name of their account.

OK, so i will install exim on china DC machine and will inform china users
to use china mail IP address to send email. But how to use AUTH ? How to
configure AUTH ? Also for local copy of user database means should i need
to create mail boxes for china users locally also ? Is there any howto
document available for that ?

Also we don't want to switch china user mailboxes to China we need to keep
all user mailboxes to primary MTA.

>> Not sure why not, but it's a separable issue from the outbound.

The only reason that i don't want to separate user mailboxes locally i.e.
china user mailboxes on china exim server and US user mailboxes to primary
MTA is i don't want to use different domains i.e. all users emails on same
domain regardless of china or US. e.g. china [at] example and usa [at] example

Also I need to know how to do it to receive emails ?

>> Have your user-database know where each user wants their mail (US or
China).
Look that up in the routers, and deliver to file (if on the correct machine
already)
or by smtp to the alternate machine.

Need to check US mail server router section ? Infact i am not sure how to
implement this how to deliver to file.

>> Tell your users what name (or IP) of system to use for retrieving their
mail.
Run IMAP services on both your systems. POP also, if you must, and a
webmail
if you wish.

I will inform china users to change POP settings in email client and use
china mail server IP but how it works if mailboxes resides on Primary mail
server on US ?

Both systems need to accept mail for your domain. It's probably simplest
to keep your US system named in DNS as the primary MX for your domain

I thought i mixed up entirely. It would be great help if you identify all
suggestions in steps and in sequence to improve send / receive emails from
china where users having mainly face problems when sending emails via
attachments.

Thanks in advance for your help in this regard.
--
## List details at https://lists.exim.org/mailman/listinfo/exim-users
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://wiki.exim.org/

mirfan1981 at gmail

Feb 13, 2012, 2:03 AM

Post #4 of 5 (358 views)
Permalink

Re: Exim Relay Emails to optimize email send / recieve mechanism. [In reply to]

>> Put an SMTP service on your system in China for the local users there to
use to send outbound. Tell them the name (or IP) of the system to use. Have
them use AUTH, and have a local copy of your user database there to verify
the AUTH. The system they use to send outbound via need have no connection
with the domain name of their account.

I am looking to do it through Authenticated SMTP using either PAM or
Password. The only concern what will be FROM address on recieving end ? I
mean how the recieving email will know from which domain email comes from.
Through this i think From address can be changed easily that email sent
from @xyz.com rather than original domain user @example.com.

On Mon, Feb 13, 2012 at 10:28 AM, Muhammad Irfan <mirfan1981 [at] gmail>wrote:

>
> We are using Exim MTA on dedicated server hosted on US data center with
> CENTOS 5.
> Our users are in two regions in US and China.
>
> [...]
>
>
> Because china users have to connect to
> US DC SMTP server and because of slow connectivity issues users suffers
> alot.
>
>
>
> >> Put an SMTP service on your system in China for the local users there
> to use to send outbound. Tell them the name (or IP) of the system to use.
> Have them use AUTH, and have a local
> copy of your user database there to verify the AUTH.
> The system they use to send outbound via need have no connection
> with the domain name of their account.
>
>
> OK, so i will install exim on china DC machine and will inform china users
> to use china mail IP address to send email. But how to use AUTH ? How to
> configure AUTH ? Also for local copy of user database means should i need
> to create mail boxes for china users locally also ? Is there any howto
> document available for that ?
>
>
>
> Also we don't want to switch china user mailboxes to China we need to keep
> all user mailboxes to primary MTA.
>
>
> >> Not sure why not, but it's a separable issue from the outbound.
>
>
> The only reason that i don't want to separate user mailboxes locally i.e.
> china user mailboxes on china exim server and US user mailboxes to primary
> MTA is i don't want to use different domains i.e. all users emails on same
> domain regardless of china or US. e.g. china [at] example and
> usa [at] example
>
>
> Also I need to know how to do it to receive emails ?
>
> >> Have your user-database know where each user wants their mail (US or
> China).
> Look that up in the routers, and deliver to file (if on the correct
> machine already)
> or by smtp to the alternate machine.
>
>
> Need to check US mail server router section ? Infact i am not sure how to
> implement this how to deliver to file.
>
>
> >> Tell your users what name (or IP) of system to use for retrieving their
> mail.
> Run IMAP services on both your systems. POP also, if you must, and a
> webmail
> if you wish.
>
>
> I will inform china users to change POP settings in email client and use
> china mail server IP but how it works if mailboxes resides on Primary mail
> server on US ?
>
>
> Both systems need to accept mail for your domain. It's probably simplest
> to keep your US system named in DNS as the primary MX for your domain
>
>
> I thought i mixed up entirely. It would be great help if you identify all
> suggestions in steps and in sequence to improve send / receive emails from
> china where users having mainly face problems when sending emails via
> attachments.
>
> Thanks in advance for your help in this regard.
>
--
## List details at https://lists.exim.org/mailman/listinfo/exim-users
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://wiki.exim.org/

mirfan1981 at gmail

Feb 15, 2012, 2:29 AM

Post #5 of 5 (347 views)
Permalink

Re: Exim Relay Emails to optimize email send / recieve mechanism. [In reply to]

Jeremy Harris>> Put an SMTP service on your system in China for the local
users there to use to send outbound. Tell them the name (or IP) of the
system to use. Have them use AUTH, and have a local copy of your user
database there to verify the AUTH. The system they use to send outbound via
need have no connection with the domain name of their account.

Muhammad Irfan>> I am looking to do it through Authenticated SMTP using
either PAM or Password. The only concern what will be FROM address on
recieving end ? I mean how the recieving email will know from which domain
email comes from. Through this i think From address can be changed easily
that email sent from @xyz.com rather than original domain user @example.com.

Muhammad Irfan>> I thought through this i will meet my objective that all
outgoing emails will route through china mail server and incoming will
serve from US mail server where all china users mailboxes resides.

Muhammad Irfan>> Can someone please let me know about it.

On Mon, Feb 13, 2012 at 3:03 PM, Muhammad Irfan <mirfan1981 [at] gmail>wrote:

> to use to send outbound. Tell them the name (or IP) of the system to use.
> Have them use AUTH, and have a local copy of your user database there to
> verify the AUTH. The system they use to send outbound via need have no
> connection with the domain name of their account.
>
> I am looking to do it through Authenticated SMTP using either PAM or
> Password. The only concern what will be FROM address on recieving end ? I
> mean how the recieving email will know from which domain email comes from.
> Through this i think From address can be changed easily that email sent
> from @xyz.com rather than original domain user @example.com.
>
>
>
> On Mon, Feb 13, 2012 at 10:28 AM, Muhammad Irfan <mirfan1981 [at] gmail>wrote:
>
>>
>> We are using Exim MTA on dedicated server hosted on US data center with
>> CENTOS 5.
>> Our users are in two regions in US and China.
>>
>> [...]
>>
>>
>> Because china users have to connect to
>> US DC SMTP server and because of slow connectivity issues users suffers
>> alot.
>>
>>
>>
>> >> Put an SMTP service on your system in China for the local users there
>> to use to send outbound. Tell them the name (or IP) of the system to use.
>> Have them use AUTH, and have a local
>> copy of your user database there to verify the AUTH.
>> The system they use to send outbound via need have no connection
>> with the domain name of their account.
>>
>>
>> OK, so i will install exim on china DC machine and will inform china
>> users to use china mail IP address to send email. But how to use AUTH ? How
>> to configure AUTH ? Also for local copy of user database means should i
>> need to create mail boxes for china users locally also ? Is there any howto
>> document available for that ?
>>
>>
>>
>> Also we don't want to switch china user mailboxes to China we need to keep
>> all user mailboxes to primary MTA.
>>
>>
>> >> Not sure why not, but it's a separable issue from the outbound.
>>
>>
>> The only reason that i don't want to separate user mailboxes locally i.e.
>> china user mailboxes on china exim server and US user mailboxes to primary
>> MTA is i don't want to use different domains i.e. all users emails on same
>> domain regardless of china or US. e.g. china [at] example and
>> usa [at] example
>>
>>
>> Also I need to know how to do it to receive emails ?
>>
>> >> Have your user-database know where each user wants their mail (US or
>> China).
>> Look that up in the routers, and deliver to file (if on the correct
>> machine already)
>> or by smtp to the alternate machine.
>>
>>
>> Need to check US mail server router section ? Infact i am not sure how to
>> implement this how to deliver to file.
>>
>>
>> >> Tell your users what name (or IP) of system to use for retrieving
>> their mail.
>> Run IMAP services on both your systems. POP also, if you must, and a
>> webmail
>> if you wish.
>>
>>
>> I will inform china users to change POP settings in email client and use
>> china mail server IP but how it works if mailboxes resides on Primary mail
>> server on US ?
>>
>>
>> Both systems need to accept mail for your domain. It's probably
>> simplest
>> to keep your US system named in DNS as the primary MX for your domain
>>
>>
>> I thought i mixed up entirely. It would be great help if you identify all
>> suggestions in steps and in sequence to improve send / receive emails from
>> china where users having mainly face problems when sending emails via
>> attachments.
>>
>> Thanks in advance for your help in this regard.
>>
>
>
--
## List details at https://lists.exim.org/mailman/listinfo/exim-users
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://wiki.exim.org/

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