Hi! On Wed, Aug 11, 2010 at 7:50 PM, Christopher Adams <adam...@gmail.com> wrote: > Hello all, > > I am having a bit of a problem and I am not sure that it is specifically > Postfix-related, but I'll give it a shot. Feel free to flog me or tell me to > go away.
Ok: go away! No, just kidding, read on. > > I am running Postfix 2.3 on a CentOS Linux server. > > I noticed on our firewall that there were constant connections from the > machine running Postfix to addresses all over the world. The interesting > thing is that the connection is using OpenDNS [208.67.216.132], a public DNS > server. I do not use OpenDNS in my /etc/resolv.conf file (I have 2 other > nameservers listed) and I don't know where it is coming from. Here is an > example: > > Aug 11 16:01:25 swiki postfix/smtp[7832]: E38F8DB4CCB: to=<ysamo9...@sx.cn>, > relay=none, delay=30, delays=0/0/30/0, dsn=4.4.1, status=deferred (connect > to sx.cn[208.67.216.132]: Connection timed out) Can you post the other lines of this log (same ID: E38F8DB4CCB), where there is the *from*, and see if the *from* is from your domain, if no: maybe you are an open relay. Also, take a look at your mail queue run: mailq > > If this is the appropriate place to post this question, can someone who > knows more than me analyze this and come up with a theory as to what is > going on? Yes, it is, at least judging by the log entry you sent, that's a postfix log. > > Thanks for any help you might want to provide. > No problem. Ildefonso.
