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Throttling Exchange 2013

June 30, 2019, 7:18 pm
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I see that I can limit outgoing mail in Exchange 2013 to 1 a minute.  Is there a way I can throttle more?  Like 1 every 2 minutes? Also is there a way to limit the number of times that emails can be sent to a single recipient in a specific chunk of time?

We tried some scripting based on the following articles:

https://docs.microsoft.com/en-us/previous-versions/office/exchange-server-2010/bb232205(v=exchg.141)

https://docs.microsoft.com/en-us/powershell/module/exchange/server-health-and-performance/Set-ThrottlingPolicy?view=exchange-ps

In particular we tried this:

New-ThrottlingPolicy -Name UserLimitSent -RecipientRateLimit 50 -MessageRateLimit 1

it did not work - it seems it only works for POP3 or IMAP4 clients that use SMTP.  We use Outlook and OWA.

How do we throttle Exchange 2013 with the type of granularity we are wanting?

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Three server relay

July 2, 2019, 9:09 am
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Let me explain the issue because there are two of them (we think).

We have three exchange servers.

A. Exchange 2007 (in a WS2008 AD)

B. Exchange 2013 (in a WS2012 AD)

C. Exchange 2019 (in a WS2019 AD)

There are several domain names on server B, but only one domain that is shared between all three servers.

For over a year, A and B shared a domain, then C was installed this year (two weeks ago).

None of the servers are in the same AD.

External mail for the sharedomain.com comes to B.

If it gets mail for users that aren't on B it relays to A.

When someone on A sends e-mail to a user not on A it gets relayed to B.

Once C was introduced, C was told to forward to B, B still to A, and A changed to forward to C.

It was working for a couple of days then stopped.

Also, server C will not send any e-mail at all, even though the logs say e-mail is being handed off.

Even Hotmail is not receiving e-mail from server C.

Also we're assuming that B stopped receiving from C but can't show it.

Any help is appreciated.

Alert from Microsoft Forum

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Exchange Edge Transport Attachment filter removes excel/word files which have xml

July 2, 2019, 9:53 am
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Exchange Edge Transport Attachment filter removes excel/word files which have xml and there is no log in Agent Logs

Regards Ajinkya Ghare MCITP-Server Administrator | MCTS

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Emails are slow leaving Outlook outbox

April 12, 2018, 10:58 pm
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I have a few users in a remote site that complain of message sitting in the outbox some time before moving to submission. Would Outlook logging give e any information on what's happening. I don't see any issues on the server side. Submission logs do not show any failures. What would be the best way to capture helpful information. Any assistance would be appreciated.  
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Not able to receive email in Exchange Server

July 5, 2019, 10:00 am
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Hello

I have implemented Exchage server name abc.com is local and my dns register domain in xyz.com

* i am able to send email inside and outside users but i am not able to receive email from outside.

* i think this is dns records issue. can you please help me what are the dns records do we require so that email can be received from outside.

*.  what types of dns records do we need and it has to be created on local dns or public dns. 

*. we have domain registerd on freenoms.

can you please help me on this.

Thank you

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Journal Mails not getting Delivered and Message count is increasing in the Transport Server issue in Exchange Server 2013

July 10, 2019, 12:58 am
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Hi Team,

Journal Mails not getting Delivered and Message count is increasing in the Transport Server issue in Exchange Server 2013. I am having two Trapsort servers. One Trasport Server working fine. In another Tranport this problem is occuring. Please suggest accordingly.

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Retrigger Mails from Exchange server side

July 10, 2019, 1:10 pm
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Dear All,

I have situation where in all External Mails were dropped by our smart host for particular period of time

From Exchange side they are not in queue and delivery report says delivered

I was working wit CISCO ESA support and according to them, there is no way messges can be retriggered or NDR can be genearted for te dropped messsages

I just want to know can we resend these messages from Exchange server or some how generate NDR for such external mails

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System can't send test-email over SMTP/TLS

July 15, 2019, 12:59 am
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Dear all exchange experts,

Our QDAS system used to send email over 25 annoymous. Currently we have to disable annoymous authentication, instead we decide to send email over  587/TLS, so we create receive connector as below:

however, it does not work when test sending email in QDAS system configuration page:

The email account used is an email user without issue. the log in smtpreceive folder saying:

*,None,Set Session Permissions>,"220 CN-BJI-EXCHP02.Geely.Auto Microsoft ESMTP MAIL Service ready at Mon, 15 Jul 2019 13:26:13 +0800",<,EHLO PCName,
*,None,Set Session Permissions>,250-CN-BJI-EXCHP02.Geely.Auto Hello [10.57.101.133],>,250-SIZE 57671680,>,250-PIPELINING,>,250-DSN,>,250-ENHANCEDSTATUSCODES,>,250-STARTTLS,>,250-AUTH GSSAPI NTLM,>,250-8BITMIME,>,250-BINARYMIME,>,250 CHUNKING,<,RSET,
*,Tarpit for '0.00:00:05',>,250 2.0.0 Resetting,<,MAIL FROM: <user.qdas@domain.com>,
*,Tarpit for '0.00:00:05' due to '530 5.7.1 Client was not authenticated',

It's saying Client was not authenticated. But the account username and password should be correct

What can be the issue here and how to track?

Thanks in advance


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TLS

July 15, 2019, 4:44 pm
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Hello,

When I run a test from MX Tool box against my mail server I get a message that TLS is not enabled. I have tried to follow the article here:

https://terenceluk.blogspot.com/2013/09/enabling-tls-for-exchange-server-2010.html

to enable TLS but I still get the same result. Under receive connectors I have two connectors: 1. Client and 2. default. I have enabled TLS under both. Please confirm that I need to have both enabled.

This is Exchange 2010. Can you tell me what to check or how to enable it? Do we actually need it enabled.

Thank you. Karel Grulich, MCSE, SBS


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Exchange Toolbox Error when launching

June 2, 2019, 8:37 am
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Hi Guys,

Is it possible reinstalling Exchange Toolbox and Exchange Management shell on existing and running Exchange 2013 Server?

I am getting an error when launching Exchange management shell (Unable to connect winrm, even though winrm is configured), and Exchange Toolbox (loading/freezing, and then error). 

note: sorry Can't provide screenshots right now.

thanks,

GT


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Sending emails from Exchange Server to Postfix Server 2013 in the same domain

July 17, 2019, 4:33 am
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I have an Exchange 2013 server with domain domena.pl. As an external server, I have a postfix from doemna domena.pl. The Postfix server receives the mail and forwards it to exchange. I have mail accounts on the postfix server from which the mail is not transferred to exchange. At the same time, I would like to send emails to these accounts on the postfix server from Outlook via Exchange. Unfortunately, Outlook shows that such an account does not exist. How do you set up a send connector for a Postfix server?


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Mail From External Contacts to shared mail box, should not get a copy of emails

July 18, 2019, 12:41 am
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We have request from the Business Team

We have DG for External Contacts

A new shared mail box is created and any mail to the shared mailbox is been forwarded to the DG External Contacts

Mail From External Contacts to this shared mail box, should not get a copy of emails  

Please let me the possibility and suggestions

Thanks

Rahul

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External Contact receiving an NDR

July 18, 2019, 5:38 am
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When an external contact sends a mail to shared mail box, sender receives the below NDR

Your message couldn't be delivered because delivery to this group is restricted to authenticated senders. If the problem continues, please contact your email admin

HOW EVER THE RECIPIENT GETS THE MAIL IN HIS INBOX

Sender is annoyed of the NDRs

Settings like "Required authentication" was uncheck from day 1

Please suggest


Rahul

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Exchange 2013 CAS server maintanance mode before the start the OS security patches every month

July 18, 2019, 1:11 pm
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Hi MVP,

I have push the July'19 Month Microsoft OS patches using with SCCM 2012 on Exchange 2013 CAS server. Need to reboot the CAS Exchange 2013. Without users impact, i have to reboot the Exchange 2013 server. Please let me know the procedure.

Infrastructure for Messaging servers:

1- Exchange 2013 CAS server

3-Mailbox Servers Exchange 2013.

Thanks,

Sami

Thanks-Sami

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July 24, 2019, 1:33 am
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Healthmailbox flooding log

May 9, 2019, 3:59 am
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Hi

I am begining to see alot of log entries for mails sent to and from healthmailboxes.

How do I troubleshot and fix that?

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How this spoof worked?

July 26, 2019, 6:35 am
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We recently received an email into the CEO's inbox, supposedly from himself asking to release some emails after logging in. He didn't send these emails, and our SPF/DKIM records did not get checked as shown from the header here (mycompany.com is us):

x-env-sender: root@vps.z19.web.core.windows.net
authentication-results: spf=none (sender IP is 85.158.142.43)
  smtp.mailfrom=vps.z19.web.core.windows.net; mycompany.com; dkim=none
  (message not signed) header.d=none;mycompany.com; dmarc=none action=none
  header.from=mycompany.com;compauth=pass reason=704

I'm just at a loss as to how they managed to spoof the email. Does anybody smarter than me have any ideas how and how to protect against it?

I've found a bunch of stuff online about this *web.core.windows.net being a blob storage website on Azure which then seems quite legitimate when it's"Microsoft" that's sending you this email.

Cheers!

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Recieving lot of spam emails which are coming directly to our exchange server, not through EOP

July 27, 2019, 10:41 pm
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Hi Team,

In our On-Prem setup we were using cisco IronPort as our email gateway. Recently we purchased licenses for ATP and configured them as per the policy and using it as the spam filter. Now we are receiving spam emails, when we are checking the message header for the spam email it is clearly mentioning that it directly came to exchange server without going through O365. When analyzing the message header for genuine emails it shows that it comes through O365 protection. We have already done the MX, SPF record changes in DNS.

Kindly someone suggest what we can do for this.

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The result is an error in the test command of OAuth authentication for hybrid migration.

July 30, 2019, 7:08 pm
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The result is an error in the test command of OAuth authentication for hybrid migration.

Test-OAuthConnectivity-Service EWS-TargetUri https://outlook.office365.com/ews/exchange.asmx -Mailbox sample01 -Verbose | Format-List

When I checked the error code "AADSTS700027" from the error contents, it seems that the reason is that the certificate key can not be found.
I imported the certificate I exported from the on-premises Exchange server into Exchange Online, but I found no problems with the certificate. It has not expired yet.
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Exchange Mail Flow - Routing

August 1, 2019, 6:16 am
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Hi,

I'm in the process of migrating to a hybrid O365 solution but having some challenges with outbound mail from On-prem mailbox to mailboxes in Exchange online. What we're seeing is Exchange is trying make a connection with smart host tenent.mail.protection.onmicrosoft.com but is failing. My question is, how does Exchange make decisions about how to route traffic? I'm not talking here about connectors which manage point to point mail flow. I'm more interested in traffic at the network level.

We use a proxy server in our environment and I've defined this in -internetwebproxy (set-exchangeserver). I can see that traffic to port 80/443 is using the proxy. Less clear is why traffic to Exchange Online over port 25 is trying to go direct to the internet. The EOL send connector is configured to "used DNS (MX) records to route mail automatically". As a result the connector tries to connect to a smart host which is the IP associated withtenent.mail.protection.onmicrosoft.com over port 25. The problem is, instead of going out over the proxy, traffic is trying to go direct and is being blocked by our firewall.

So to summarise, how does Exchange make decisions about how network traffic should flow?

Thanks in advance

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