[cobalt-users] RAQ4: can't receive email for some domains

["Carsten Buchberger" <admin@xxxxxxxxxxxxxxxxxxxxx>]

hi all,

this is is the first time for me to participate at this list and i hope my
problem is posted to the right group.

first of all : this is a raq4r. it is hosted by a big german hosting
company. dns is done by our provider.
for almost 1 and 1/2 years everything was fine.

now, my problem is, that on some domains i can send email without problem
but i can't receive email for it.

when i send an email from an account/domain which is not hosted on our raq4
, to one of those domains  (for example webmaster@xxxxxxxxxxxxxxx) i get the
following response :

The original message was received at Thu, 5 Sep 2002 19:36:36 +0200 (MET
DST)
from pD95601F4.dip.t-dialin.net [217.86.1.244]

--snip--
   ----- The following addresses had permanent fatal errors -----
<webmaster@xxxxxxxxxxxxxxx>

   ----- Transcript of session follows -----
... while talking to mannheimeins.de.:
>>> RCPT To:<webmaster@xxxxxxxxxxxxxxx>
<<< 550 5.7.1 <webmaster@xxxxxxxxxxxxxxx>... Relaying denied.  Please check
your mail first.
550 <webmaster@xxxxxxxxxxxxxxx>... User unknown

--snip--

for me that is a little bit confusing.

i always thought this would be the errormessage i would get if i try to send
an email with the account webmaster@xxxxxxxxxxxxxxx without checking it
befor (smtp-after-pop)

when i send an email from an account/domain which is hosted on our raq
everything is fine.

well, i searched the archives and someone had a problem of this kind to, and
you advised him to check if his
mx entries were ok and to do a traceroute and stuff like that.

i checked the mx entries, they point to mannheimeins.de and that is ok.

so i did a traceroute to mannheimeins.de - it told me the domain could not
be reached. (same with the ip)
i did ping mannheimeins.de - nothing. (same with the ip)

this was even more confusing because website can be reached under
http://www.mannheimeins.de.

i checked a litte further and what i found was:

most of our domains are within a certain network (212.227.251.xxx), some are
not.
one of those is mannheimeins.de, it is in 217.160.79.xxx.
and we have some domains in 212.227.248.xxx. with this domains the
email-stuff works,
but you cant do a traceroute or a ping with them.

i suppose this could be the cause for our problem. my first question is : is
this a thing we as server-owner can fix or has it do with our hosting
provider ? and the second one, if we can fix it, is how to fix it.

i hope this wasn't too confusing.

thanks in advance

carsten

___________________
placetobee®-portale
ebene5
carsten buchberger
adolfsallee 27-29
65185 wiesbaden
0049 / 611 812 04 39 (fon)
0049 / 611 988 36 99 (fax)



















___________________
placetobee®-portale
ebene5
carsten buchberger
adolfsallee 27-29
65185 wiesbaden
0611 812 04 39 (fon)
0611 988 36 99 (fax)