From: mouss (moussnetoyen.net)
Date: Fri Apr 04 2008 - 11:50:13 CDT

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alanpatriot.net wrote:
> I should first report that thanks to a valiant and diligent member
> of the PatriotNet support group, my problems with sasl have now been
> solved. I can send out mail from my Debian etch box just fine.
>
> But I have some problems with my main.cf which I'd like resolved. I
> sent mail yesterday to "postmaster". According to my /etc/aliases,
> mail for postmaster should go to "root" and mail for "root" should go
> to "alan"(my username on my home machine). But this isn't what happens.
> My present configuration sends this mail to "postmasterpatriot.net".
> I wonder what would happen to mail sent by, say, a cron job on my
> machine that failed. (Isn't such mail sent to root, and hence passed
> on to me?)
>

it all depends on your configuration, which you forgot to post.
/etc/aliases are only used for mail delivered locally (in general, this
means the domain is listed in mydestination). non fqdn addresses are
subject to rewrite (myorigin).
> The postfix documentation says that: " A null client is a machine that
> can only send mail. It receives no mail from the network, and it does not
> deliver any mail locally. A null client typically uses POP, IMAP or NFS
> for mailbox access."
>
> Now this _almost_describes me. I never want to receive mail on
> my machine. I want to use fetchmail to bring it home from my ISP,
> PatriotNet. Except, since I"m running Linux, there may be occasions,
> as described above, where I want to receive mail that originates on
> my machine, without it flying out to the outside world. Hence my
> arch term "pseudo null client".
>

there's no such thing. if it's not a "null client", it's a server for
its domains.
> This can't be a hard problem. But I've read quite a bit of the
> documentation, and can't find exactly what I'm looking for. And
> I am not eager to do lots of experimentation with my /etc/postfix/main.cf,
> which I'm not good at.
>
> Will some kind soul, perhaps having achieved a solution for her/himself,
> give me pointers about what to do? (My machinename: alanmcc )
>

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