On 28/10/2013 18:36, Tim Legg wrote:
Attached is the postconf -n
I've also been reading the link that Dr. Venema sent me. Could it be
that the mydestination is incorrect? Could it be:
mydestination = timothyxxxx.com, localhost.localdomain, localhost
The above is what you need in order for your machine to accept mail
addressed to {user}@timothyxxxx.com. However, you currently have this
instead:
> mydestination = mail.timothyxxxx.com, localhost.localdomain, localhost
That will accept mail addressed to {user}@mail.timothyxxxx.com, which is
not the same thing.
You appear to be under the mistaken impression that mydestination and
myhostname are equivalent and must contain the same (or similar) values.
That's not the case, at all. myhostname is, as the name implies, the
specific name of the *machine* on which Postfix is running.
mydestination is the domain, or comma-separated list of domains, that
the machine handles mail for.
Typically, the hostname of the machine will be a hostname within one of
the domains in mydestination, simply because most people use an MTA to
receive mail for themselves. But it doesn't have to be.
In your particular case, since the MX records for timothyxxxx.com point
to mail.timothyxxxx.com, then the most obvious (although not necessarily
essential) myhostname value is mail.timothyxxxx.com. And, since the MX
records for timothyxxxx.com point to mail.timothyxxxx.com, then the
server needs to include timothyxxxx.com in mydestnations. Simple!
Having said that, I do agree that the Ubuntu documentation is
misleading. In the basic configuration section, it says this:
The user interface will be displayed. On each screen, select the
following values:
Internet Site
mail.example.com
steve
mail.example.com, localhost.localdomain, localhost
No
127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 192.168.0.0/24
0
+
all
Replace mail.example.com with the domain for which you'll accept
email, 192.168.0.0/24 with the actual network and class range of your
mail server, and steve with the appropriate username.
Although the final paragraph is correct to say that you must "Replace
mail.example.com with the domain for which you'll accept email", it's a
poor example because mail.example.com is not, normally, used to
illustrate a domain - instead, that value is usually used to illustrate
a hostname (which, in the second line, it does). And using the same
example value in myhostname (line 2) and mydestination (line 4) wrongly
implies that the two should be the same.
What the documentation should say is this:
The user interface will be displayed. On each screen, select the
following values:
Internet Site
mail.example.com
steve
example.com, localhost.localdomain, localhost
No
127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 192.168.0.0/24
0
+
all
Replace example.com with the domain(s) for which you'll accept email,
mail.example.com with your actual hostname, 192.168.0.0/24 with the
actual network and class range of your mail server, and steve with
the appropriate username.
Specifically, the error made by the author is to use the same sample
value for two different fields which, in real life, will usually have
different actual values (albeit often, though not necessarily, related).
Although someone who reads the official Postfix documentation will be
able to figure it out for themselves, it still behoves the author of any
tutorial to ensure that any worked examples or sample values they use
reflect the most common real life usage.
If you want to feed that back to the Ubuntu documentation maintainer,
then feel free.
Mark
--
My blog: http://mark.goodge.co.uk
