Comments on: SOLVED: 4.2.1 Unable to connect.” Attempted failover to alternate host… https://www.urtech.ca/2011/12/solved-4-2-1-unable-to-connect-attempted-failover-to-alternate-host/ Technology Doesn't Stop & Neither Does URTech.ca Sun, 01 Mar 2015 20:07:43 +0000 hourly 1 By: Ian Matthews https://www.urtech.ca/2011/12/solved-4-2-1-unable-to-connect-attempted-failover-to-alternate-host/comment-page-1/#comment-178593 Sun, 01 Mar 2015 20:07:43 +0000 http://www.urtech.ca/?p=1888#comment-178593 In reply to Tjday.

Sorry, that is not an error I have run into. I would just Google and see what comes up.

]]> By: Tjday https://www.urtech.ca/2011/12/solved-4-2-1-unable-to-connect-attempted-failover-to-alternate-host/comment-page-1/#comment-178157 Wed, 18 Feb 2015 22:51:31 +0000 http://www.urtech.ca/?p=1888#comment-178157 When I got to this step “Type mail from: yourname@yourdomain.com and enter.”

I got the following error 500 #5.5.1

]]> By: DJM https://www.urtech.ca/2011/12/solved-4-2-1-unable-to-connect-attempted-failover-to-alternate-host/comment-page-1/#comment-2809 Tue, 12 Feb 2013 19:48:43 +0000 http://www.urtech.ca/?p=1888#comment-2809 After telnet to port 25 failed, tracert from firewall failed too. Opened ticket with ISP who was able to duplicate issue.

]]> By: Ron https://www.urtech.ca/2011/12/solved-4-2-1-unable-to-connect-attempted-failover-to-alternate-host/comment-page-1/#comment-2357 Mon, 29 Oct 2012 18:47:30 +0000 http://www.urtech.ca/?p=1888#comment-2357 In our case, we need to ensure the IP ranges on the Hybrid Receive Connector and the NAT rule for port 25 matched.

In addition to the original port ranges on the receive connector, we also added the ranges for ‘Microsoft Online Services’ from the microsoft site.

http://onlinehelp.microsoft.com/Office365-enterprises/hh373144.aspx

]]> By: gerd https://www.urtech.ca/2011/12/solved-4-2-1-unable-to-connect-attempted-failover-to-alternate-host/comment-page-1/#comment-2233 Wed, 19 Sep 2012 08:18:25 +0000 http://www.urtech.ca/?p=1888#comment-2233 if your exchange server don’t have enough space on C: the same Error occurs.

]]> By: Ian Matthews https://www.urtech.ca/2011/12/solved-4-2-1-unable-to-connect-attempted-failover-to-alternate-host/comment-page-1/#comment-1477 Thu, 29 Dec 2011 18:08:01 +0000 http://www.urtech.ca/?p=1888#comment-1477 In reply to MxToolBox.

Your service is excellent and I am very happy to support it.

Thanks and have a HAPPY NEW YEAR!

]]> By: MxToolBox https://www.urtech.ca/2011/12/solved-4-2-1-unable-to-connect-attempted-failover-to-alternate-host/comment-page-1/#comment-1471 Wed, 28 Dec 2011 15:04:40 +0000 http://www.urtech.ca/?p=1888#comment-1471 Thanks for recommending our SuperTool. I also noticed that you recommended another source for checking you rDNS, our tool does that as well. We’ve worked hard to build an all encompassed tool, if you have any feedback, we’d love to hear it!

Thanks,
@mxtoolbox

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