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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We created a shared mailbox but we wanted to see if there is a way to send an alert or notifications to certain staff when an email arrives in that mailbox without forwarding the message.

I didn't see anything in the rules on the server or client other then text messages
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Where within the Gmail email admin console do I need to go so I can view what email aliases and distribution lists have been created for our email domain?
Is it possible to host users within the same email domain within Office 365 and to host a few remaining users within a Gmail corporate account?

Users within both Office 365 and Gmail will both use the same email domain name which is

A company I am working for would like this to be done since they don't want to have to pay for an Office 365 licensing fee for all users and would like only the employees to be migrated into Office 365. They would like the contractors and consultants to be left within Gmail.

If this is possible what is involved in setting up this type of coexistence?

We have a client who has just had a DKIM domainkey setup for them. Unfortunately some emails are not getting through to the end users (especially if using Mimecast mail servers).

We have been doing some testing and have found that:
Emails that do not have an attached file - it pass the DKIM checks.
If emails have attached documents, they seem to pass OK as well.
If emails have got an attached email that was originally from the sender, it passes OK
If an email has an attached email from a third party (that has originally been changed with DKIM) it fails the DKIM test on our/the recipients servers. This has happened to us and we use exchange online servers.

When it fails it says dkim=fail (body hash did not verify)

They have a valid SPF record also setup and every email through the testing procedure seems to pass on the SPF checks without any failures.

There is no DMARC record setup yet, but as far as I can see this is the next step after we have got DKIM working correctly.

Unfortunately our client who is having this problem quite often forward a lot of emails during their working day so need this resolving.

Any help would be appreciated.
I have a site that has SBS2011 (which has Exchange 2010).  Approx 2 weeks ago the server stopped being able to send any email addressed as Gmail, hotmail and

When I run ExRCA it seems that when the server does the MX lookup it succeeds, but then does something wierd for the SPF lookup.  It appears to look for its own spf record, and instaed persuses the spf for the reporting that "Sender ID validation failed".  Am I reading the Exrca results wrong?

 Performing Outbound SMTP Test
  The outbound SMTP test failed.
 Additional Details
Elapsed Time: 33947 ms.  
 Test Steps
 Attempting reverse DNS lookup for IP address nnn.nnn.nnn.nnn.
   The Microsoft Connectivity Analyzer successfully resolved IP address nnn.nnn.nnn.nnn via reverse DNS lookup.
     Additional Details
  The Microsoft Connectivity Analyzer resolved IP address nnn.nnn.nnn.nnn to host
Elapsed Time: 11276 ms.  

Performing Real-Time Black Hole List (RBL) Test
  Your IP address wasn't found on any of the block lists selected.
 Additional Details
Elapsed Time: 22361 ms.  
 Test Steps
 Checking Block List "SpamHaus Block List (SBL)"
  The address isn't on the block list.
 Additional Details
IP address nnn.nnn.nnn.nnn wasn't found on RBL.
Elapsed Time: 33 ms.  

 Checking Block List "SpamHaus Exploits Block List (XBL)"
  The address isn't on the block list.
 Additional …
Hello I have a problem The “MAIL FROM” address (“MAILER-DAEMON”, from header field “Return-Path”) was rejected.

We have an Exchange 2010 environment with several mailbox servers a single DAG and one CAS/OWA server. (we are unable to upgrade the version yet due to compatibility issues but we are working on it)

There were some issues when we were originally transitioning from 2003 so the Exchange admin at that time never implemented a CAS array.  

As part of our Disaster Recovery plan I would like to set up a second CAS server in our DR/colo site and have mail automatically flow through it should my primary site go down.  Of course mail has to keep flowing while I set up the new server and move over to the new array.

My question is is it possible to set up a new CAS server, create an array and move over to it without causing an interruption in mail?  Would my users continue to get mail from the stand-alone CAS server while I am transitioning them to the array?  what would be the order of steps to implement this change?  

As an added complication we are using VERITAS Enterprise Vault to archive our mail so we need to maintain Enterprise Vault integration in OWA.  But this is not a part of my original question.

Thank you.

We have Exchange 2007 server onsite and now planning to move to office 365 and I would like to go with the Hybrid Environment.

I ran the Exchange Deployment Assistant and on the document it says I need to configure Outlook Anywhere on our on- premises Exchange Server (because the email migration service uses RPC over HTTP)

Currently staff use OWA 2007 from outside through For this I procured the SSL from Trustico
The document says that I must use a certificate issued by a trusted certification authority (CA) with your Outlook Anywhere configuration.

So do I need to procure another SSL certificate to setup Outlook Anywhere. Bit confused here.
Please let me know how to go about.

Any help will be great.
In my Exchange environment, I have a public-facing Spamtitan server doing receiving/sending and spam-filtering, etc. Behind it is the Exchange 2007 with Hub Transport, Client Access and Mailbox roles. The other public-facing server is the OWA server with Client Access role.  

I need help with setting up an IMAP client.
First of all, in my environment as above, what should the incoming/outgoing email servers be?
Secondly, in Binding tab, it is port 143 for TLS and port 993 for SSL.
in Authentication tab, 'Secure logon' is checked while the X.509 certificate name is the OWA server name.

Can you help please?
Dear Guys, please assist this scenario:
- Action: We changeed Email server from Gmail to Exchange 2016 On-premise, so we had to change the domain records in Domain control panel. We changed TXT, MX, @, mail records.

- Problem: After changes, the new Exchange server worked (send/receive emails) normally as expected, however we realized that we could still login to Gmail account, Google Drive and sent emails (but could not receive emails)

So can you please explain?
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Hi, we setup successfully Exchange 2016 server on win 2012r2, but cannot login to MS Outlook as exchange account, only POP or IMAP. What should we do? please help
Dear Experts, as my understanding, Exchange DAG (for 2 nodes) is the cluster that replicate all data from Mail Server1 to Mail Server2. Is it still correct in SAN storage environment? If so, everything related to mail in SAN storage will be duplicated, am I right? Can we configure so that there is only one version of data exists on it and there are only 2 VM servers for HA-failover?

Many thanks as always!
I will split points as equally as I can, this is asking for an opinion.

My website/email server hoster has recently introduced a spam filter on their servers.  This spam system has decided has started to spam me.  Apparently because the concerning information is often very similar (probably Question alert:, Help Answer:....) and because the body of the text sometimes contains unrecognisable words (possibly things like: what does for(int x=1;x<q*q;x+=3){q=foo(x);} mean).

Now comes the fun bit.
I have asked if I can white list the email address.  No, the spam filter works only with IMAP and is self learning.
I have pointed out I use POP3.  The spam filter works on all emails both POP3 and IMAP, but only learns on IMAP.

My opinion is that this filter is well meant but actually a terrible idea.  What are your opinions.
Hi Can

I install on the same Domain Controller environment a second Exchange Server?

They will be different version example one will be 2007 and the other 2016 - Reson not to all the step from migrating from 2007 to 2016 and I just export and import the PST from one server to the other. Also considering creating another domain on the same network just for mail.

Can I have some suggestions, please ?


What are the exact steps to lookup which company hosts a company's external DNS records?

I will be migrating a company from a corporate Gmail account to Office 365. Currently no one knows which company is being used to host this company's external DNS records. I will need to change these external DNS records to point to the Office 365 servers to successfully complete the migration from Gmail to Office 365.

I'm already familiar with using websites like but where within or other websites can I determine exactly which external DNS provider hosts a company's external DNS records including the MX records?

outlook email alerts not coming. How keep alerts so that when email comes popup comes and also preferably some sound comes?
please advise
Hello! I would like to use task scheduler on a Synology NAS, running a custom bash script, to query some data from mariadb (mysql). Can anyone help me with syntax for sending mail? (i have the query...)
I have Exchange 2010 email account that is being forwarded to a distribution group that contains multiple recipients. I want to prevent the recipients from being able to reply to the original email sender. Is there  a way to do this through Exchange?
Hi, we are testing Exchange 2016 on Server 2012R2, I could access OWA, send/receive emails internally/externally but could not connect via MS Outlook or Mobile apps. Does any get this experience? Please help!

Update: In MS Outlook, it keeps asking for my credentials even when I hit correct details
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Dear, I tried but could not start this service. Does anyone get this error before? Can you please help?
Many thanks in advance,
Dear Experts, we are deploying Exchange Server 2016-Enterprise for our company, but I only found the link for Standard version. I need to create more than 10 Mailbox Databases before I got the proper license of Enterprise version. Is it possible? If so, can anyone explain please?
Hi All,
we are in planning phases for exchange upgrade, we are upgrading from Exchange 2007 (Service pack 2: Build 6002) to Exchange 2016,
have anyone did a similar project? what patches we need to apply first on exchange 2007? and can we upgrade straight from 2007 exchange to exchange 2016? anything we need to be careful about? how do we migrate the data stores / user accounts and exchange licenses ( bought it from GoDaddy)

After reboot, I got this error in Exchange Management Console, also I could not login to OWA, it showed blank page when I entered correct username/password.

All Exchange services are running. Environment: Exchange 2016, Window Server 2012R2

Can anyone help, please?
A user is sending e-mails on the Copier scanner to an internal e-mail address and they are bouncing back with the following error.
all other users can send to their addresses no problem. Just seems to be this particular mail box. I tried adding an Alias address, but still get the same error.

Anyone got any ideas? Seems to be something in there Exchange server.
Really appreciate the help!

From: Mail Delivery System []
Sent: Wednesday, 9 August 2017 1:19 PM
To: Axxxx
Subject: Undeliverable: Scan Data from FX-D54219

Delivery has failed to these recipients or groups:
This message was rejected by the recipient e-mail system. Please check the recipient's e-mail address and try resending this message, or contact the recipient directly.
The following organization rejected your message: 58.XX.XX.111.

Diagnostic information for administrators:
Generating server:
58.XX.XX.111 #<58.XX.XX.111 #5.1.0 smtp; 554 5.1.0 Sender denied> #SMTP#
Original message headers:
Return-Path: <>
Received: from (unknown [10.XX.XX.24])
by (Postfix) with SMTP id 4C230A74087
for <>; Wed, 9 Aug 2017 05:18:41 +0000 (UTC)
Received: from (unknown [])
by (Postfix) with ESMTP id CFCB3894054…

I have a user with iPhone 5E and iOS version 10.2.1.

I am trying to add an email (Exchange 2007) to her iphone but it keeps showing certificate not trusted. I have tested the same email account on another iphone with same iOS version but different model and it works okay. I have deleted the account and re-added it but no success.

When adding an account on her phone, it says "cannot verify server identity" but error is caused by the certificate not trusted error.

Please see the attached. There isn't even a menu Trust at the top.

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.