Discuss mailing list

[Alex Hanselka <alex AT hanselka.name>]

Interesting issue! The server you listed here is fine with both domains I 
have here (lists.opennicproject.org and hanselka.name) and the other OpenNIC 
servers seem fine as well. It could have been any number of things but if the 
resolvers are showing ok on the T2 log, they are likely fine.  You can always 
test a server before you use it by doing "dig MX hanselka.name @IP" for 
instance to see if it resolves properly.  Other factors could be your system 
or if you are running BIND locally, sometimes it can break things or change 
/etc/resolv.conf for you. 

I know that I have been using my own OpenNIC resolvers and some others and I 
have had no issues with mail on this or other servers I use. 

There are actually many factors to what could have been wrong, but I highly 
suggest you turn on "delayed notifications" in postfix to tell you if your 
messages are delayed past whatever predefined threshold you have set, 
especially if you are sending very urgent emails.

Alex

On Wed, Feb 29, 2012 at 07:42:33PM +0000, Peter Green wrote:
>   
> 
> Hi, 
> 
> I have just found that a good number of e-mails I have been
> sending through my mail server have not been sent. 
> 
> The error was a
> D.N.S. error, that being that the domains could not be found. 
> 
> As my
> mail server was using OpenNIC resolvers I decided to try others
> (OpenDNS) to see if that made any difference and it did! 
> 
> Now my mail
> seems to be getting out and the cue going down. 
> 
> Unfortunately I can
> only remember one of the two I.P.s I was using, but it was the first in
> my list; 89.16.173.11 which is showing as ok on the monitor. 
> 
> This is
> troubling and has caused some considerable problems due to important
> business mail not getting out. Don't get me wrong, I'm not pointing my
> finger or wanting to blame anyone, I take responsibility for using
> OpenNIC resolvers, but it's not a good place for me to be and puts me
> off using them and I'm keen, what will it do to others confidence?
> 
> 
> Could it have been the resolvers I was using, or something else?
> 
> 
> Peter