Do your tested results show anything different on this site? http://www.blacklistalert.org/
-- Espi On Tue, Oct 7, 2014 at 1:02 PM, Steve Ens <[email protected]> wrote: > Yes, already tried that. I can do a MX lookup, but cannot telnet to the > server. Also getting this in the logs Error Code: 10061, Error Message: > No connection could be made because the target machine actively refused it > That seems to point to us being blacklisted, but I come up clean on the > mxtoolbox tests. > > On Tue, Oct 7, 2014 at 2:48 PM, Kennedy, Jim <[email protected] > > wrote: > >> What are the domains? Could be bad bounces from spam to non-existent >> domains Your server can not contact them, so it tried alternates either in >> dns or per the RFC's (for example A record of domain.com) and that >> failed. So it is still trying. >> >> >> >> Do an MX lookup from your transport server to verify your DNS is working. >> Then try telnet port 25 from the transport server to that IP to verify >> connectivity. What do you get? >> >> >> >> *From:* [email protected] [mailto: >> [email protected]] *On Behalf Of *Steve Ens >> *Sent:* Tuesday, October 7, 2014 3:42 PM >> *To:* [email protected] >> *Subject:* [Exchange] 421 4.2.1 Unable to connect errors >> >> >> >> Odd errors in my mail queue. Just started appearing yesterday. Most >> mail gets sent, but from certain domains I get these errors. "Attempted >> failover to alternate host, but that did not suceed." Anyone see this >> before? Exchange 2010 on Windows 2008 R2. >> > >
