On Tue, Feb 11, 2014 at 9:34 AM, c cc <sub...@gmail.com> wrote:
> Andreas,
>
> Thanks for your quick reply--is there a setting in Postfix that I should
> configure to fix this problem? Thanks!
>
Forget about postfix. First validate you have connection to that
server. i.e. can you reach that port while in ipv6? Do not continue
until you can prove that.
> Charles
>
>
> On Tue, Feb 11, 2014 at 8:18 AM, <lst_ho...@kwsoft.de> wrote:
>>
>>
>> Zitat von c cc <sub...@gmail.com>:
>>
>>
>>> Hi,
>>>
>>> All of the sudden, we can't send any email to one particular domain, and
>>>
>>> below is the error message we got. Does anyone have any idea how to fix
>>>
>>> this problem? Thanks!
>>>
>>> Charles
>>>
>>> ------------------------------------------------------------
>>> This is the mail system at host es1.mydomain.com.
>>>
>>> I'm sorry to have to inform you that your message could not
>>> be delivered to one or more recipients. It's attached below.
>>>
>>> For further assistance, please send mail to postmaster.
>>>
>>> If you do so, please include this problem report. You can
>>> delete your own text from the attached returned message.
>>>
>>>
>>> The mail system
>>>
>>>
>>> <myn...@mail.xxdomain.com>: connect to
>>> xxdomain.com[2607:f220:404:8104::80e7:5a78]:25: Network is
>>> unreachable
>>
>>
>>
>> Looks like your IPv6 connectivity is broken. Works from here:
>>
>> telnet -6 nihcesxway5.hub.nih.gov 25
>> Trying 2607:f220:404:8104::80e7:5a78...
>> Connected to nihcesxway5.hub.nih.gov.
>> Escape character is '^]'.
>> 220 nihcesxway5.hub.nih.gov ESMTP
>> quit
>> 221 nihcesxway5.hub.nih.gov
>> Connection closed by foreign host.
>>
>> But not really fast, though.
>>
>> Either way there are some other MXs as far as i see so your mail should
>> get through (later).
>>
>> Regards
>>
>> Andreas
>>
>>
>
