?
Solved

Incoming Mail issues

Posted on 2015-01-28
3
Medium Priority
?
141 Views
Last Modified: 2015-01-29
Having a strange issue that I can't seem to figure out.
Transferred my domain to a new registrar, rebuilt the DNS records, now some people are having issues receiving mail from senders. Everything seems random, have found almost no common-denominators.

Setup is an internal exchange server (singular).
Mx record mail.mydomain.com points to an IP address, resolves every time I look the record up.

Using the microsoft exchange connectivity tool, I'm having different results nearly every single time I run the test.
Under exchange tests, I run an incoming mail test, put in the users email address and run it.

Sometimes it resolves correctly, sometimes It cannot find a MX record for the domain, sometimes it can't find a valid host record...
example errors:

      The Microsoft Connectivity Analyzer wasn't able to retrieve MX records from DNS.
try again a second later, it worked.

I see no problems with the DNS zone file, the MX and A records look fine. Various emailers have gotten kickbacks
stating domain does not exist,

#554 5.4.4 SMTPSEND.DNS.NonExistentDomain; nonexistent domain ##
I've tested a great deal of things, completely puzzled here.

any and all feedback is greatly appreciated!
0
Comment
Question by:paulrausch
3 Comments
 
LVL 6

Accepted Solution

by:
JeffG2583 earned 1000 total points
ID: 40576212
You can pick a few root DNS servers and try an NSLOOKUP for your MX record. If it works on one and not the other, it's probably a DNS replication lag that SHOULD resolve itself.
0
 
LVL 24

Assisted Solution

by:VB ITS
VB ITS earned 1000 total points
ID: 40576243
When did you make the changes to DNS? DNS propagation by nature can take up to 48 hours to take effect. There's not much you can do to speed up DNS propagation from your end but wait really.
0
 
LVL 2

Author Closing Comment

by:paulrausch
ID: 40577377
Looks like two things are likely.

DNS replication lag, alongside, strangely enough, problems with the microsoft connectivity analyzer.
Looks like it might have problems resolving names -.- I've read of other people having the same problem
with problems resolving host names.

You both suggested my first suspicions, but kudos nonetheless :).
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Exchange administrators are always vigilant about Exchange crashes and disasters that are possible any time. It is quite essential to identify the symptoms of a possible Exchange issue and be prepared with a proper recovery plan. There are multiple…
This applies to Dell but may also apply to other manufacturers as well. We ran across a few machines that just dropped recently it trust relationship with the server. After doing the basic removing and joining the domain again, it changed to No logo…
In this video we show how to create an email address policy in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.:  First we need to log into the Exchange Admin Center. Navigate to the Mail Flow…
This video demonstrates how to sync Microsoft Exchange Public Folders with smartphones using CodeTwo Exchange Sync and Exchange ActiveSync. To learn more about CodeTwo Exchange Sync and download the free trial, go to: http://www.codetwo.com/excha…
Suggested Courses

569 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question