c cc:
> Andreas,
>
> Thanks for your quick reply--is there a setting in Postfix that I should
> configure to fix this problem? Thanks!
Try using his telnet example first. If that doesn't work then no
amount of Postfix tweaking will help.
Wietse
> 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
> >
> >
> >
