[nflug] Email

eric eric at bootz.us
Thu Aug 16 08:08:25 EDT 2007

Starting new sub-thread..
 Darin, can I ask, what are all the mail packages you use postfix, etc..

I'd love an outline or rough draft?

Darin Perusich wrote:
> Will this machine be an MX server or will it be behind your MX and 
> relaying from there? I'm also not understanding your SPAM tagging 
> point. Are you concerned about your relay marking mail from the 
> domains it's relaying for marking them as SPAM? This is easily 
> remedied by setting the following spamassassin rule and included ALL 
> of the relaying domains:
> header LOCAL_RCVD Received =~ /.*\(\S+\.cognigencorp\.com\s+\[.*\]\)/
> describe LOCAL_RCVD Received from local machine
> score LOCAL_RCVD -50
> The only way outgoing mail will be sent from a different IP is using 
> some type of virtualization, and why doesn't this even matter? It 
> sounds like over complicating the setup.
> You mentioned using Postfix for the MTA, a wise move IMHO ;-). Are you 
> planning on using amavisd-new to filter, tag spam, and virus check? 
> This is a very typical and efficient setup for relaying for multiple 
> domains not to mention straightforward. Your setup is a little more 
> complication then what I have setup here but it's pretty much the 
> same. If you want more details let me know.
> Robert Meyer wrote:
>> OK, before we get into this, remember that this is NOT my design.  
>> I'm trying to make the best of what I have here...  Having said that...
>> We currently have several clients, all using an Imail server 
>> (remember, not my design) to handle Email.  We are also routing a few 
>> Exchange servers through it.  In essence, all mail coming in for 
>> these clients hits a single server that separates the domain names 
>> and routes the mail to the backend servers.  We also have some 
>> clients that are actually storing their mail on the Imail server.  
>> These two functions are going to be separated so that the relay 
>> server and the POP/IMAP functions are on different boxes.  The mail 
>> servers that I relay for also relay back through the Imail server.  
>> The problem is that if one client gets infected with a spam virus or 
>> otherwise gets the server tagged as a spam host, it breaks all of the 
>> clients that route through that server.  We (actually, they) want to 
>> keep the single relay host, because it's good for troubleshooting.  
>> (remember, not my design)
>> What I need to know is:  Is there any way that I can set up a system 
>> that will relay mail from internal mail servers but have the IP 
>> address leaving the server be different for each domain.  
>> Essentially, I want it to look like each domain is coming from a 
>> different server.  We are switching the relay server to CentOS (RHEL 
>> clone) and are going to use Postfix for the relay functions.
>> The only idea that comes to mind is to create multiple virtual 
>> servers with VMWare and route each client through a different virtual 
>> machine.  I know I can create multiple IP aliases on the machine.  
>> Can I leverage that somehow to get different source addresses for 
>> different domains?
>> Thanks...
>> Cheers!
>> Bob
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