Hi Colin, On 2/18/2016 7:24 AM, Colin Jack wrote:
> Generating server: EXCHANGE.mainline.local > Receiving server: solarspeed.net (208.77.221.199) > > mstau...@solarspeed.net > Remote Server at solarspeed.net (208.77.221.199) returned '400 4.4.7 Message > delayed' > 18/02/2016 13:09:44 - Remote Server at solarspeed.net (208.77.221.199) > returned '441 4.4.1 Error encountered while communicating with primary target > IP address: "Failed to connect. Winsock error code: 10060, Win32 error code: > 10060." Attempted failover to alternate host, but that did not succeed. > Either there are no alternate hosts, or delivery failed to all alternate > hosts. The last endpoint attempted was 208.77.221.199:25' Well there are many things that it could be, and I might suggest starting with some diagnostics on your system. I see that the Exchange server you're using doesn't report a proper hostname. Although that may be simply cosmetic, it's something that as a sysadmin would drive me up a wall. So... that could be fixed. There's a DNS oddity in that message in that your Exchange server says "Remote Server at solarspeed.net (208.77.221.199)"... but the MX record is mail.solarspeed.net. Both A records point to the same destination IP, so that's not the cause of your issue, but again, something odd that may warrant a look. Finally, the 400 error is indicating a DELAY, most likely due to greylisting on the solarspeed.net server. Why your Exchange server would treat that as an outright rejection is a cause for investigation on the Exchange system. You may find that your queue timeout is too short. Set for 5-minute retries and at least a 1-hour timeout (though I'd recommend longer) to accommodate proper greylisting - not to mention other legitimate delivery delays. Why the 400 4.4.7 turns into 441 4.4.1 is a mystery to me. Based simply on the information shared here, and understanding that I am not by any stretch an Exchange admin (I'm far too handsome for that - LOL!) I would recommend taking a good look at that Exchange server. There's enough to suggest that something(s) may be a little off. I hope that helps point in a direction. -- Chris Gebhardt VIRTBIZ Internet Services Access, Web Hosting, Colocation, Dedicated www.virtbiz.com | toll-free (866) 4 VIRTBIZ _______________________________________________ Blueonyx mailing list Blueonyx@mail.blueonyx.it http://mail.blueonyx.it/mailman/listinfo/blueonyx
