Oh boy, an email question! Time to dust off my memories...
On Apr 28, 2014, at 8:53 AM, Nathan Hruby <[email protected]> wrote: > Hi, > > Fred is what you would call a "smarthost" in MTA parlance. How sendmail-centric of you. With Postfix (which I'd recommend for this) your term is relayhost. > Note that the edge system may not need a full blow MTA running on > them. Something like ssmtp, dma, etc.. may be simpler and more > secure. Right. A relatively dumb "forward and forget" system at the originating system makes sense; the inbound IP restrictions (add each one in my_networks), the rules for Fred being a princess (transport_maps will save you here provided your routing table is correct), message_size_limit will help-- but be aware that you probably want to go 33% high on this number; MIME encoding adds some overhead. If Fred needs to rewrite the envelope, header_checks can do this. Lastly, this seems fairly complex. I think you might be better off pushing back against some of these requirements; it's a bit arcane! -- Corey
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