Email Server Solution

[Smith, Albert]

> -----Original Message-----
> From: redhat-list-bounces at redhat.com 
> [mailto:redhat-list-bounces at redhat.com] On Behalf Of Steve Buehler
> Sent: Wednesday, August 03, 2005 9:09 AM
> To: General Red Hat Linux discussion list
> Subject: RE: Email Server Solution
> 
> At 02:12 PM 8/2/2005, you wrote:
> > > At 12:06 PM 8/2/2005, you wrote:
> > > > > It would be nice if email would appear to come from the IP of 
> > > > > the domain and not the IP of the server itself.
> > > >
> > > >Do you mean the IP address of the sender?
> > >
> > > No.  We have several hundred IP based domains on one of 
> the servers 
> > > in question.  When they pop into their domain on the server, it 
> > > still goes out from the primary IP of the server instead 
> of the IP 
> > > of the domain they pop into.  Ensim (the control panel we use) 
> > > virtualizes the domains into their own server, for the 
> most part.  
> > > Some things are not though.  And sendmail is one of the 
> things that 
> > > isn't virtualized.  I know it can be done for a large 
> price tag, but 
> > > we would have to change to many things to do that.  Basically we 
> > > would have to lose our Ensim control panel.  Which might not be a 
> > > bad idea.
> > >  But the other solution that we found was going to cost us about 
> > > $50K and that is not an option.  No I don't remember what 
> the other 
> > > solution is/was.  It has been about a year ago that we 
> found it and 
> > > at that price, we just passed right over it.
> >
> >Can't you modify your sendmail.cf file to use masquerading for those 
> >servers?
> 
> Will masquerading rewrite it so that all email for a 
> particular domain will go back out from the IP address of the 
> domain instead of the server?  We use an Ensim control panel 
> that might overwrite the sendmail.cf file when I do an 
> upgrade.  I think they have made it so that it won't do that 
> anymore though.  I have never done masquerading, I will have 
> to read up on it unless someone here can tell me what to add 
> to the sendmail.mc file or the sendmail.cf file.  It would be 
> nice to have it in the sendmail.mc file so that whenever the 
> sendmail.cf file is rebuilt, I won't have to edit it again.
> 
> Thanks
> Steve
> 
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> 

I am by no way a sendmail expert but it sounds like Masquerading is what
you want to do if you are using native sendmail. But I have done
masquerading in the past and basically how it works is that anyone that
connects to it for SMTP communications would have their domain name
changed to whatever the masquerading option is set to in the mc or the
cf file. If it is in the MC all you would need to do is modify the
masquearding lines which are commented out then run an m4 against it to
compile the MC. Do you want all outbound messages to come out as a
single domain or do you want to have multiple out bound domains? 

That would determine how many sendmail servers you would need to have
and I would assume the control panel would allow you send messages
through a different SMTP server then the one they control.


What does your vendor support say about this question?