Re: Snow Leopard Server Mail Settings?

In our previous episode (Tuesday, 05-Mar-2013), Ashley Aitken said:
> 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.

Be careful. If not setup correctly, you *will* lose legitimate mail.

For example, when I set up greylisting I had to exclude amazon.com and =
just about every bank on the planet because either they resent mail from =
different servers (amazon) ior they never sent mail ever (most banks).

>> 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.

Any domain that is reachable and has rDNS setup.

> 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?

Without knowing your network topology, it is impossible to say.

>> 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.

You will run into problems sending mail if your mailserver's FQDN =
doesn=92t match the name it gives when it connects to outbound servers. =
If you relay via your ISP, this doesn't matter.

> 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 =85

These are all names that the mailserver will treat as local.

> 2. Enable virtual hosting
> Checked on.
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> What does this actually do?

In Mail setup? no idea. Does OSXS support webmail?


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