Comments on: Block External Emails for an Exchange Server 2013 Mailbox https://practical365.com/block-external-emails-exchange-server-2013-mailbox/ Practical Office 365 News, Tips, and Tutorials Fri, 12 Jul 2019 08:28:47 +0000 hourly 1 https://wordpress.org/?v=6.6.1 By: Ganesh Wadkar https://practical365.com/block-external-emails-exchange-server-2013-mailbox/#comment-218662 Fri, 12 Jul 2019 08:28:47 +0000 https://www.practical365.com/?p=7368#comment-218662 Hello Sir,

I have MS Exchange server 2016. I am getting many spam email in Queue Viewer with Blank sender email, like.. From Address:

how can i block this type Emails.

]]> By: Nabil IT https://practical365.com/block-external-emails-exchange-server-2013-mailbox/#comment-160149 Wed, 11 Jul 2018 10:19:33 +0000 https://www.practical365.com/?p=7368#comment-160149 Hi,
Good Good Post, Can We block incoming mail iso files example for all domain ?
Regards

]]> By: Rizwan Ahmed Sahibzada https://practical365.com/block-external-emails-exchange-server-2013-mailbox/#comment-158201 Wed, 18 Apr 2018 07:10:31 +0000 https://www.practical365.com/?p=7368#comment-158201 Hi,
How we can do this by Exchange management shell ?

]]> By: <div class="apbct-real-user-wrapper"> <div class="apbct-real-user-author-name">Paul Cunningham</div> <div class="apbct-real-user-badge" onmouseover=" let popup = document.getElementById('apbct_trp_comment_id_137174'); popup.style.display = 'inline-flex'; "> <div class="apbct-real-user-popup" id="apbct_trp_comment_id_137174"> <div class="apbct-real-user-title"> <p class="apbct-real-user-popup-header">The Real Person!</p> <p class="apbct-real-user-popup-text">Author <b>Paul Cunningham</b> acts as a real person and passed all tests against spambots. Anti-Spam by CleanTalk.</p> </div> </div> </div> </div> https://practical365.com/block-external-emails-exchange-server-2013-mailbox/#comment-137174 Mon, 21 Aug 2017 22:27:56 +0000 https://www.practical365.com/?p=7368#comment-137174 In reply to William Henderson.

You could look at using a transport rule to block based on source IP address.

]]> By: William Henderson https://practical365.com/block-external-emails-exchange-server-2013-mailbox/#comment-137153 Mon, 21 Aug 2017 21:34:55 +0000 https://www.practical365.com/?p=7368#comment-137153 How do I block specific ip addresses from external sources?

]]> By: Dan Gurney https://practical365.com/block-external-emails-exchange-server-2013-mailbox/#comment-120026 Mon, 24 Jul 2017 11:20:52 +0000 https://www.practical365.com/?p=7368#comment-120026 In reply to Alain De Meulemeester.

Not saying this is definately the case but the problem I was having would certainly produce this behaviour.

Try running
Get-RemoteDomain | select IsInternal | fl

If it returns “IsInternal : True” then Exchange will treat all domains as Internal and no rules based on Internal vs External domains will work properly.

]]> By: Dan Gurney https://practical365.com/block-external-emails-exchange-server-2013-mailbox/#comment-108006 Mon, 03 Jul 2017 10:14:11 +0000 https://www.practical365.com/?p=7368#comment-108006 In reply to Dan Gurney.

Just in case any one is interested; this turned out to be due to the IsInternal parameter. Somehow (don’t ask me how) it had been set to ‘True’ for the default remote domain (*). Set it to false and all works as it should. I can’t imagine how it’s happened, it must have been at some point during our co-existence with 2007.

]]> By: Alain De Meulemeester https://practical365.com/block-external-emails-exchange-server-2013-mailbox/#comment-86549 Thu, 18 May 2017 12:49:49 +0000 https://www.practical365.com/?p=7368#comment-86549 In reply to Alain De Meulemeester.

Sorry, forgot to say that I tested sending a mail from my private acoount to one of the test users, but the mail goes straight through

]]> By: Alain De Meulemeester https://practical365.com/block-external-emails-exchange-server-2013-mailbox/#comment-86545 Thu, 18 May 2017 12:40:52 +0000 https://www.practical365.com/?p=7368#comment-86545 I tried using this to block incoming external mail to a group of people.
Created a security group “RejectExternalMail” , added a couple of test users.
Created Rule
If the message is sent to a member of group RejectExternalMail and is received from ‘Outside the organization’
do the following
reject the message and include the explanation etc…..
Rule mode “Enforce”

Rule IS active and there are no other rules are active.

Any ideas / tips???

]]> By: <div class="apbct-real-user-wrapper"> <div class="apbct-real-user-author-name">Paul Cunningham</div> <div class="apbct-real-user-badge" onmouseover=" let popup = document.getElementById('apbct_trp_comment_id_83470'); popup.style.display = 'inline-flex'; "> <div class="apbct-real-user-popup" id="apbct_trp_comment_id_83470"> <div class="apbct-real-user-title"> <p class="apbct-real-user-popup-header">The Real Person!</p> <p class="apbct-real-user-popup-text">Author <b>Paul Cunningham</b> acts as a real person and passed all tests against spambots. Anti-Spam by CleanTalk.</p> </div> </div> </div> </div> https://practical365.com/block-external-emails-exchange-server-2013-mailbox/#comment-83470 Mon, 08 May 2017 22:52:08 +0000 https://www.practical365.com/?p=7368#comment-83470 In reply to Paul Cunningham.

Ok. I can’t think of a reason why that would be happening then. Perhaps something weird with the accepted domains, remote domains, or send/receive connectors. Probably worth opening a support case with MS so they can see your environment and provide advice.

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