Can you telnet into the receiving server and send a message?
On Tue, Oct 7, 2014 at 10:08 PM, <[email protected]> wrote: > I was leaning towards this too, yet I can send to most domains. > > Sent from my BlackBerry 10 smartphone. > *From: *Micheal Espinola Jr > *Sent: *Tuesday, October 7, 2014 7:55 PM > *To: *exchange > *Reply To: *[email protected] > *Subject: *Re: [Exchange] 421 4.2.1 Unable to connect errors > > Have you also tested the sending domain? I'm partial to this being an > RDNS-related issue. > > -- > Espi > > > On Tue, Oct 7, 2014 at 5:06 PM, <[email protected]> wrote: > >> Receiving >> >> Sent from my BlackBerry 10 smartphone. >> *From: *Micheal Espinola Jr >> *Sent: *Tuesday, October 7, 2014 6:55 PM >> *To: *exchange >> *Reply To: *[email protected] >> *Subject: *Re: [Exchange] 421 4.2.1 Unable to connect errors >> >> is animikisee.ca the sending or receiving domain? >> >> -- >> Espi >> >> >> On Tue, Oct 7, 2014 at 4:23 PM, Steve Ens <[email protected]> wrote: >> >>> Looks to be listed on the mailpolice sites. Never heard of those >>> before. I turned off blacklisting on the animikisee.ca site >>> altogether. Still same thing. >>> >>> On Tue, Oct 7, 2014 at 5:56 PM, Micheal Espinola Jr < >>> [email protected]> wrote: >>> >>>> 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. >>>>>> >>>>> >>>>> >>>> >>> >> >> > >
