Ram:
> 
> On 07/09/2013 05:33 PM, Wietse Venema wrote:
> > Ram:
> >> On 07/09/2013 04:24 PM, Wietse Venema wrote:
> >>> Ram:
> >>>> Today I use in master.cf
> >>>>
> >>>> smtp      unix  -       -       n       -       -       smtp
> >>>>       -o smtp_bind_address=X.X.X.X
> >>>>       -o fallback_relay=newhost
> >>>>
> >>>> But I have a requirement that the fallback mails should be sent via a
> >>>> different smtp_bind_address
> >>>> How can I specify this in smtp fallback
> >>> You configure this in the "newhost" MTA.
> >> I want the fallback mail to go via a new bind address
> >>
> >> I can not specify
> >> -o fallback_relay=smtpnew:[newhost]

> > There are a bazillion things that you can't specify with fallback_relay
> > or other Postfix parameters. I document only the things that are
> > promised to work.

> I guess I understand that.  But I think the requirement would be 
> reasonable If I have 2 networks I may need to have different bind addresses
> On the fallback_relay , can  I specify any command line parameter ?

All supported behavior is documented including command line.

> > Postfix does not support multiple smtp_bind_address settings. if
> > you really need that then you can use some network address/port
> > translation rule in the IP stack.
> >
> >     Wietse
> 

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