Acording to this :
       smtp_sasl_password_maps (empty)
              Optional Postfix SMTP client lookup tables with one
              username:password  entry  per  remote  hostname  or
              domain, or  sender  address  when  sender-dependent
              authentication is enabled.

http://www.postfix.org/postconf.5.html#smtp_sender_dependent_authentication

smtp_sender_dependent_authentication (default: no)
Enable sender-dependent authentication in the Postfix SMTP client;
this is available only with SASL authentication, and disables SMTP
connection caching to ensure that mail from different senders will use
the appropriate credentials.



On Fri, Dec 14, 2012 at 2:49 AM, SFX Group <cont...@ashleygriffin.ca> wrote:
> Hi
>
> I have never used Postfix, i am a network specialist and understand the
> methods of SMTP (i deploy Exchange server regularly), I have a Zimbra ZCS v8
> server (testing it), i understand it uses postfix, however its not in the
> default location (its loaded its own one in the zimbra folder).  Whats the
> best software to GUI admin this (Postfix admin?)
>
> By default this will only receive and send mail end to end (i have not
> enabled any relay to another SMTP server inside Zimbra).
>
> What i need to do as set the MTA to look at the from address (when sending
> email from this MTA) then use a relay SMTP server based on the "from"
> address (sometimes with or without username / password).  However all other
> addresses not listed needs to send end to end (from the MTA directly, not
> through a relay).
>
> I was going to try and use:
>
> relayhost =
> sender_dependent_relayhost_maps = <relayhost file>
> smtp_sasl_password_maps = <password file>
>
> <relayhost_file>
> m...@gmail.com [smtp.gmail.com]
> m...@aol.com [smtp.aol.com]
> m...@aol.com [smtp.aol.com]
> m...@domaina.com [smtp.domaina.com]
>
>
> <password_file>
> m...@gmail.com username:password
> m...@aol.com username:password
> m...@aol.com username:password
>
>
> My understanding is the password file can be specific about the user needing
> authentication as i will have more than one FROM in the same domain meaning
> different username and passwords for the same relay domain name (the above
> shows aol.com)  domaina.com also doesnt need a username / password to relay
> mail (it uses the FROM address)
>
> However i need anything else that postfix is trying to send if its not
> listed in relayhost_file then it should attempt to send this directly (end
> to end) and not use any relay.
>
> Is this possible?
> I have access to main.cf, however its in a zimbra specific location so i
> assume they have hybrid most of the postfix system.
>
>
> Many Thanks
> Ashley
>
>
>
> --
> View this message in context: 
> http://postfix.1071664.n5.nabble.com/Postfix-used-as-End-to-End-and-relaying-to-external-SMTP-server-based-on-FROM-address-possible-tp53191.html
> Sent from the Postfix Users mailing list archive at Nabble.com.

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