Re: Snow Leopard Server Mail Settings?

On Mar 6, 2013, at 2:00 PM, [email protected] wrote:

> Message: 3
> Date: Wed, 6 Mar 2013 13:34:22 +0800
> From: Ashley Aitken <[email protected]>
> Subject: Re: Snow Leopard Server Mail Settings?
> To: "[email protected] OSX" <[email protected]>
> Message-ID: <FF7A6CC2-5670-45A2-BE7F-A06C7430BF21-ee4meeAH724@public.gmane.org>
> Content-Type: text/plain; charset=3Dus-ascii
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> Hi Mike (et al.),
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> Thank you for your very helpful post Mike.
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> On 06/03/2013, at 12:31 PM, Mike Friedman <[email protected]> =
wrote:
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>> By default, greylisting is turned on. That's the issue you're having. =
This delays email being delivered to reduce spam. Spammers will rarely =
if ever retry a send., If it fails, they give up after one. But a =
properly configured server will try again after a given interval.
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>> This explains how to turn if off. Be careful though because it can =
accidentally get turned on. Apple's server admin doesn't respect hand =
edited configuration files very well.
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>> http://labs.hoffmanlabs.com/node/1755
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> After posting, I became aware also that I was confusing real-time =
blacklisting with greylisting.  I have used real-time blacklisting in =
the past as well but I believe I turned it off for some reason.
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>> =46rom what I read it sounds like a good thing to have greylisting - =
IIRC it did reduce my spam significantly, apparently because spammers =
don't retry bounced emails - so I will leave it on.
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>> To answer your questions in order.
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>> 1. Your internet domain should be one of the domains that you receive =
mail for such as : blahblah.com.
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> I am sorry to be pedantic (because postfix is ;-) but do you really =
mean any domain?  I receive mail for a handful of domains?  How will it =
be used?  E.g. I don't want email replying from one domain for another.
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> As I mention, I current have this as "local"  which has seemed to work =
fine, since I guess it is a (local) domain from which the server =
receives email for.  Can I leave this as that?
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>> 2. The host name is the public host name of the system (your MX =
record will tell you what this should be). mail.blahblah.com would be a =
common one for the domain in #1.
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> By public host name I guess you mean FQDN?
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> I have set this as the public host name of the server (which is the MX =
record) mail.mydomain.com but then I seem to remember emails replying =
with addresses like name-i4yH9JU3wRtWVPTZF4YnfwC/[email protected], which didn't look very good.
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> I currently have this as "mydomain.com" and it seems to work ok =
(maybe).  Can I leave this as that?  Sorry, again just trying to be =
clear.
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>> You should also set up a reverse DNS lookup for your mail server's =
public name. Some servers will reject mail that doesn't have a correct =
reverse DNS lookup. Your ISP can do this for you since they control the =
DNS for the IP addresses that they give out to their customers.
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> I have that thanks.
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> Finally, if you don't mind me asking another question, in Mail Server =
> Advanced > Hosting, there are another two setting as well that are not =
very clear:
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> 1. Include server's domain as local host alias
> Checked on.
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> What does that actually mean?  I can't parse that sentence (fragment)?
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> I currently have all sorts of things in here, e.g. mail.mydomain1.com, =
mydomain1.com, <public host name>, mail.mydomain2.com, mydomain2.com ...
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> 2. Enable virtual hosting
> Checked on.
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> What does this actually do? =20
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> Until today I think I had that on but with out any entries, and I =
thought I was hosting virtual domains just fine.  It has all worked =
fine. =20
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> Today I added  mydomain1.com just to see if it would fix things.
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> Do I need this?  What does it do?=20
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> Sorry for all the questions, and thanks again for your assistance.
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> Cheers,
> Ashley.


If you are hosting multiple domains, you'll need to use Virtual Hosting. =
To get email separated into various domains takes some work with the =
Postfix configuration files.
The GUI setup is too simplistic to handle more than two domains very =
efficiently. But it can be done.
You add the Domain to the Virtual Hosting section. Then in Workgroup =
Manager you add another username to whichever users use that domain in =
the form [email protected]
I'd also suggest read some of Postfix Virtual Hosting documentation.

Best,

Tim Roberts=