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Email Servers





Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.

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Dear Experts, do you know the option which we can use to configure the NDR report in Exchange Active Sync?

When we sent out an email to incorrect address from OWA or MS Outlook, it returned the error messages but when we sent via Outlook App mobile, it did not return anything.

Can you  please help?
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i want to migrate around 40 mailboxes to Office 365 from a Exchange server 2007 to Office 365 what is the best way to do this. without using 3rd party software.
Hi There,

I recently set up a hybrid between our on premise exchange 2013 and exchange online 365(ran hybrid set up, synced Dns and Azure. I have migrated few users to online 365 and everything is working except, the migrated 365 users don't see the on premise exchange 2013 public folder( just 3 public folder all are just calendars that not mail enabled)

I followed, the following article, both have the same instructions to enable access of on premise to 365



Based on the first article, I ran this cmt Get-OrganizationConfig | fl *public*  the output I have attached on screen shot attached

 I assume, this would make the on premise public folder available to the online 365 users, but still the users I migrated to 365 don't see any public folder. I will appreciate if anybody will have any idea if I'm missing anything.

None of the users I migrated to 365 can see the public folder. All users whose mail box resides on premise exchange 2013 are able to access the public folder
have an email I use for job prospects and a few personal friends. But I want to go off the market and block all but those few friends.

Is this possible with GMail?

We have a virtual SMTP server on premises that is connected to Exchange 365.  We are finding that a portion (not all) of the emails in the Queue folder do not get deleted after successfully being sent. This is not a gigantic problem except that recently we had to reboot that system and it sent a bucket load of old and already delivered emails out to recipients when it came back up. Has anyone ever seen this before and do you have any ideas how to fix this? In the past I have certainly seen situations where items get stuck in the Queue because they are not being sent but never when they have already been successfully sent out.

Any thoughts?

The user has a gmail account that they are connecting to on a MacBook Pro 13 with High Sierra OS.
They are using the Apple Mail App

They have noticed delays when sending email and reading attachments.

I have noticed  issues with their gmail setup:

Do they have too many messages in their inbox? They have more than 18,000 messages in the Inbox.  I can have them fix this by creating folders, moving mail, and using the excellent MailHub Mail plugin to rapidly delete and file mail.

They have created a lot of sub-folders to their gmail inbox.  Are these folders slowing down the Apple Mail? Do I need to relocate them?
gmail inbox subfolders
I also noticed, that when I moved old email to a separate folder, there was a lot of download activity.  What is the cause of that?  I only moved a few hundred, but it looks like several thousand are being categorized as 'downloading'


Archive mailbox with activityDownloading Activity message
Hi All,

  I have  client who is having an Exchange 2016 server. The users are able to send and receive emails within his domain and send to other domains but cannot receive emails from other domains.  I have checked on mxtoolbox it show smtp connect error post which I did multiple tcptrace to the email server on ports 25, 587 and 443 all of which were through.

 Need support to figure out the exact cause.
Hi All
Next month i´m planning to upgrade my Exchange 2016 DAG with CU4, to CU8.
Are there any know issues, bugs - and/or fatal errors during or after the installation of CU 8 that I have to be aware off ?

Please feel free to report all know issues.

Peter, Hostnordic
We have multiple Send Connectors with an Address Space of "*" and all of these connectors have the same cost.  

What is different is that these connectors have different Source Servers defined.

Each of these connectors is intended for a specific site.  As an example, one connector contains the source servers for site A, the next connector contains source servers for site B, and the next connector for site C, etc.  

Even though the connectors have the same address space and cost, Exchange is somehow able to use the correct connector that contains the local source servers where the message is being sent from.  My question is...how is this being done when the send connectors have the same address space and cost?
Please provide me with guides and processes on how to protect Office 365 email domains from email spoofing.

We need to prevent our Office 365 users from receiving spoofed emails that look like they were sent from legitimate existing internal email addresses.
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is it possble within Office365  to disallow the expansion of distribution group to identify individual member email address's
i am trying to limit who can send email to a distribution groups but if you expand the group ( in outlool click on the + sign next to the group) all members are listed in the To: line and email can be sent regardless of the delivery management restriction on the group
I have exchange 2010 and g suite. We want to integrate both. What my organization requires is all emails to come to our exchange server and after that it should go to g suite. What is the best practice to get this done. All emails to be synced(incoming & outgoing).

we want to make our domain primary on our exchange server.

i have taken the following steps advised by gsuite support
1. You need to disable to default routing that you added for G Suite, if you need instructions on how to find the option, you can refer to this support article https://support.google.com/a/answer/2368153?hl=en.
2. You need to have the MX records pointing to your legacy server.
3. You need to create a routing rule for your exchange server to forward emails to the test aliases of G Suite that you can find in the aliases of each user.
4. You need to add the IP addresses of the exchange server to the inbound gateway. You can find more information about it in this support article https://support.google.com/a/answer/60730.

For number 3 routing rule what can i do to accomplish this task

number 1 has been done
number 2 is in progress by our ISP
number 3 is what i need help on
number 4 has been done on gsuite admin domain

Looking forward for your suggestions. Thanks in advance
We use Exchange 2010 and have VIPRE Spam app that is supposed to move spam to a new folder designated 'SPAM'. It is identifying it as spam but not creating the SPAM folder or moving messages to said spam folder. Support with the company says its because Autodiscover is not working properly.

Their initial response is to fix any errors under test-outlookWebServices before they can offer further assistance. I have 0 issues with OWA and have 0 issues with mobile devices. 0 issues with Desktop Outlook clients yet they tell me that I must correct the error listed in the detail before they can assist. So I am looking to resolve the error, that isn't causing any problems, without creating new ones.

The error is   The certificate for the URL https://SERVER.DOMAIN.local/autodiscover/autodiscover.xml is incorrect
 . For SSL to work, the certificate needs to have a subject of SERVER.DOMAIN.local, instead the subject found is DOMAIN.com. Consider correcting service discovery, or installing a correct SSL certificate.

Obviously I cant get an alt for .local so I am trying to identify in my configuration where the system is referencing the .local domain.

internalURI is currently https://SERVER.DOMAIN.com/autodiscover/autodiscover.xml
internal URL is currently https://SERVER.DOMAIN.com/ews/exchange.asmx
externalURL is currently https://SERVER.DOMAIN.com/ews/exchange.asmx

I suppose it could be an IIS/Cert issue and not just an exchange config issue. Just looking for more …
I need to perform an iisreset on an Exchange 2010 server that is part of a DAG and running the CAS, HUB and Mailbox roles.  Will there be any failover of the databases, impact to Oulook, etc when running the iisreset?
We use Exchange 2007. I am trying to look for a free mail archive software. Please post me if these are any free software to archive user’s mail boxes.

Dear Experts, can we redirect a mail domain to mail domain?

For example: we are using domain ABC.com for Mail Exchange server, now we want to change to the new one: XYZ.com. How can we process like this:
- Send email via XYZ.com
- Receive emails via ABC.com, then all emails will be redirected to  correspondent users in XYZ.com
Looking for a simple way to setup a resource calendar where only a certain group of users require approval, but the rest do not. I  don't want to split the company into 2 seperate groups, I know that would solve it, but then I would have to continuously update  the group that represents 'everyone else'
Question: is it possible to cohost email between office 365 and google mail for business(google apps)
i would like to have a set of users / email address use office 365 and another set of users be based on the google platform.
again 1 email domain?
We have created distribution groups for users to send email from. Setup the permissions, update the address books, download the addressbooks, restarts outlook and the user can send email as though it is coming from the group. Works internal and external.

Then some amount of hours/days later we get a NDR saying you do not have permission to send as the user.

This is How we are creating the group and adding the permissions.

New-DistributionGroup -Name "Groupname" -Alias "User.alias" -Members "sendingMember" -OrganizationalUnit "OU/Email Aliases" -PrimarySmtpAddress "Group@domain.com"

Set-DistributionGroup -Identity "Groupname" -RequireSenderAuthenticationEnabled $false -EmailAddresses @{Add="Secondemail@domain.com",”thirdemIl@domain.com"}

Add-ADPermission -Identity "Groupname" -User "Sendingmember" -AccessRights "ReadControl" -ExtendedRights "Send As"

Am I missing something?
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Hi experts.

We're upgrading from Exchange 2010 to 2016 and I already have the design on my head, which will be similar to what we have on 2010, but I'm unsure regarding how many servers will we need to accommodate our mailboxes and run smoothly.

I've tried to use the  Exchange Server Role Requirements Calculator v9.1, but I'm not sure why it keeps giving me so many servers that it can't be right!
The idea is to have enough servers to run smoothly even in the case of 1 of them failing (DAG)
If someone could give me some thoughts on the below, that would be much appreciated.

Six databases, with around 200GB each
Total number of users is 1800, around 300 mailboxes per database
Average size of each mailbox is around 400mb (limit is 3GB) (they're small because we have a third-party archiving solution stubbing messages)
Growth: I don't expect us to grow a lot in mailbox numbers, let's say 25% in the next 2 years. In terms of mailbox size, I would say each mailbox could grow up to 50% in the next 2 years, so, each database would go up to 300GB or 350GB.
Outlook - 80% users will work in Online Mode and 20% in Offline Mode.
Daily email flow - Average of 5000 outbound and 12000 inbound emails. In terms of size, they're mostly small emails with a few kb.
Servers will be virtual machines in VMware.
Hosts servers have CPU Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz (logical processors 32) and no RAM restrictions (can go up to 92GB).

One …
We decided to upgrade to Exchange 2013 CU 19 from our Exchange 2010 Environment and introduced 1st Exchange 2013 C19 into the environment. However , emails are not flowing between our two environments [ i.e. between exchange 2010 and 2013]. OWA 2013 will say you dont have permission to perform this action , when test mailbox user on exchange 2013 mailbox database tries to send an email.

[ Exchange 2010 version is SP3 Rollup 9 and Exchange 2013 version is CU 19]

Exchange 2013 is multirole server and having issues with its transport service and it wont start. Attempt to restart it also results in failure.

We see this event EVENT 16023.

Microsoft Exchange couldn’t start transport agents. The Microsoft Exchange Transport service will be stopped. Exception details: Failed to create type ‘Microsoft.Exchange.MessagingPolicies.TransportRuleAgent.TransportRuleAgentFactory’ from assembly ‘C:\Program Files\Microsoft\Exchange Server\V15\TransportRoles\agents\Rule\Microsoft.Exchange.MessagingPolicies.TransportRuleAgent.dll’ due to error ‘Agent Transport Rule couldn’t load the rule collection.’. : Microsoft.Exchange.Data.ExchangeConfigurationException: Failed to create type ‘Microsoft.Exchange.MessagingPolicies.TransportRuleAgent.TransportRuleAgentFactory’ from assembly ‘C:\Program Files\Microsoft\Exchange Server\V15\TransportRoles\agents\Rule\Microsoft.Exchange.MessagingPolicies.TransportRuleAgent.dll’ due to error ‘Agent Transport Rule couldn’t load the rule collection.’.…
we have a zimbra 8.5.1 hosted in RHEL6.5(32GB RAM) and now trying to upgrade to Zimbra 8.7 in RHEL7.5(32GB RAM)
All users are POP3 users and have a total mailbox size of around 200GB.
We tried to use imapsync to copy mailboxes from old server to new server but taking long time with only 152KB transfer speed.

Is there any parameters to change for increased transfer speed or any other techniques to copy the same is recommended.

Our project is delayed just because of this transfer speed and before migration we need to have another sync to update the mailboxes.
The user reads their email on Mac, using Safari, and by going to gmail.com

On January 8, the user asked their assistant to help them get rid of all the spam and unsolicited email in their inbox.  

As soon as they looked in the Inbox, they noticed that there were only 350 or so messages in the Inbox, where they recall that there is normally over 8000. There are no more messages prior to November 2017. On that same day, they looked on  Google for gmail support, and reached a company that claimed that they could retrieve 3800 emails for them if they gave them my their card number.  The user was suspicious and didn't do this.  

Today, January 13, I was looking with them.  We went into Gmail settings and displayed the trash folder.  There were not a lot of deleted messages.  When we show ALL MAIL, more shows up, but the count includes only 350 for the inbox, and the rest appears to be normal sent mail.  

The user definitely is missing thousands of past emails.

How can we get these back?

Using Outlook 2013 with Office365. Large groups of email are missing. In the inbox sorted by date descending there a re big gaps of mail missing. Last month had quite a bit missing, more missing from the month before, then large gaps of many months with no email at all, then some from a year ago, then some from a couple years ago. Did the restore deleted items from the inbox and that restored a lot (mostly recent from the last couple of months)

Also receive this same O365 account to an Iphone and an Ipad.

I suspect it might be IOS device since I had a similar problem a while ago but in that case you could watch the email go away.

Any suggestions would be greatly appreciated.

Thank You
Is there a way to change the Reply-To or From address from incoming Internet email with the Exchange 2016 Mailbox or Edge roles?  Is there a way to accomplish this with transport rules or address rewriting?

Email Servers





Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.

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