Re: [Exchange] 421 4.2.1 Unable to connect errors

Tue, 07 Oct 2014 19:11:15 -0700

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
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
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?


--
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.








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