[Cialug] SMTP Graylisting & Iowa Telecom

[Claus]

Ken MacLeod wrote:
> On Thu, Mar 19, 2009 at 11:58 AM, Claus <cniesen at gmx.net> wrote:
> 
>> Does iowatelecom.net not handle foreign graylisting very well?
>>
>> A mail got sent via mg.iowatelecom.net [69.66.1.16] to me on Saturday
>> March 14 and I did not get the message until today.  We had a meeting about
>> the message on Monday and I was the only one in the dark.
>>
>> I use postfix with postgrey and the default delay of 5 minutes. I checked
>> the log for incoming connections from Iowa Telecom and I found one only on
>> March 14 and today.
>>
> 
> 
> I've been seeing DNS resolution problems for sites looking up my MX records
> (e.g. mailing list bounces, mailer retries).  Could be a more widespread
> problem.
> 
>   -- Ken


Hello Ken,

Everything seems to check out for me, even the reverse resolution.
What in particular about the DNS resolution gives you issues?

BTW, I noticed that an earlier message on March 11th from the same 
person (i.e. iowatelecom.net) took 5 days as well before the retry was done.

   Claus