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Re: mail (un)delivery



Douglas A. Tutty wrote:
On Mon, Sep 03, 2007 at 02:49:56PM +0100, michael wrote:
On Mon, 2007-09-03 at 09:27 -0400, Douglas A. Tutty wrote:
On Mon, Sep 03, 2007 at 02:12:42PM +0100, michael wrote:
I'm feeling a bit dense today so any help welcome!

Essentially, I've just noticed that local mail hasn't been delivered for
a couple of weeks. I can email off my box but not to my username on the
box. I can't see what the problem is. They are probably both a red
herring [1] but (a) I did have some DNS problems just prior to the last
received email and (b) switched off the box and physically moved it to a
new location (and the new IP number) just after the last received email.

I'm unsure how to go about debugging this so all pointers welcome!
Assuming that you're using exim4, check you
/etc/exim4/update-exim4.conf.conf file for the wrong IP addresses.  If
you find any, follow the instructions at the top of the file.
>From what I can tell it seems fine:
agreed

>
Assuming that you have written yourself an email on the same box, what
error messages do you get?  What does mailq say?  Are you having exim do
a reverse DNS lookup for every mail?
Yes, the box is ratty.phy.umist.ac.uk and if I email myself (mail
localusername) I get no error msgs.
mailq gives me a permission error unless I use 'sudo mailq
localusername' which then gives me michael-H
    *** spool read error: No such file or directory ***


(not sure what that means...)

What it means is that you used mailq wrong.  You don't need any
parameters but if you provide any, they are a list of message IDs.
Since no message ID will be your localusername it will fail.  Try mailq
all by itself.
I said 'no' to keeping num of DNS lookups minimal.
NB: nslookup on the machine gives multiple entries:
$ nslookup ratty.phy.umist.ac.uk
Server:         130.88.13.7
Address:        130.88.13.7#53

Name:   ratty.phy.umist.ac.uk
Address: 130.88.15.179
Name:   ratty.phy.umist.ac.uk
Address: 130.88.128.163

I don't have nslookup installed but it seems wierd to me that one
hostname would have more than one IP address.

See what mailq say and see what are in exim's logs.

Doug.


If you traceroute ratty.ph.umist.ac.uk it will go to one ip address and then the other the next time you traceroute the url, so I'm assuming this is some form of load balancing using dns.




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