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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 is there a way where I can see who has accessed specific emails in someones email account within Lotus Notes / Domino 9.0.1 Social edition? I need to retrieve this information but I'm not a massive user of Notes.
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We think we're running into a limit on SPF record lookups. Does MX and A need to be in the entry? Do they count against it? Do only the IP addresses count against the 10 lookup limit?
What characters are counted toward the character count?
These aren't the ACTUAL IP addresses used but same count.
Is this record even look right?

v=spf1 mx a ip4: ip4: ip4: ip4: ip4: ip4: ip4: -all
Further to this

can I have more details to install a POP3 client or enable IMAP?
I can send out message via Telnet fine like
29y.pngbut why I encounter problem in outlook below
30c.pngWhy? What other Email client can be used instead of Outlook?
Dear Experts, we have Exchange server 2016 on Server 2012R2. Can we using Exchange Management Shell to forward emails from a user's mailbox to another's ?

How can we do it? Many thanks!

For example:'s inbox have some emails from, we got a request to forward all emails from in user1's mailbox to
We have an Exchange 2010 Hybrid w/ O365 setup for mailflow for
We use a cloud e-mail gateway that processes e-mail coming in and going out as well.
But we are looking to add a listserv server on-prem called "Sympa".  
We'd be looking at using as a subdomain for the e-mail address for our SYmpa listserv.
Would we need to add a new MX record or just an A record?
We have a client who was on o365, we installed an on prem 2016 exchange and put into hybrid mode. All accounts were then moved to the on prem server.

We have some users using ios devices who cannot sync their email, account setup goes though but they wont show any data.
This error is logged;

An exception occurred and was handled by Exchange ActiveSync. This may have been caused by an outdated or corrupted Exchange ActiveSync device partnership. This can occur if a user tries to modify the same item from multiple computers. If this is the case, Exchange ActiveSync will re-create the partnership with the device. Items will be updated at the next synchronization.

--- Exception start ---
Exception type: Microsoft.Exchange.Data.Storage.SyncStateExistedException
Exception message: The sync state named Policy already exists.
Exception level: 0
Exception stack trace:    at Microsoft.Exchange.Data.Storage.SyncState.CreateSyncStateFolderInFolder(SyncStateInfo syncStateInfo, Folder syncStateParentFolder, PropertyDefinition[] properties, Object[] values, ISyncLogger syncLogger)
   at Microsoft.Exchange.Data.Storage.SyncState.CreateSyncStateItemFromDirectItem(PropertyDefinition[] properties, Object[] values)
   at Microsoft.Exchange.Data.Storage.SyncState.Commit(PropertyDefinition[] properties, Object[] values)
   at Microsoft.Exchange.AirSync.Common.SyncStateDataInfo.SaveToMailbox()
   at Microsoft.Exchange.AirSync.Common.Command.WorkerThread()
Hello together,

i do have the following problem:

I have a "corrupt" Exchange-Database which needs to be moved to a new one.
I have already moved all mailboxes (1,2 TB) and all PublicFolders (180 GB).

Now at my last checks, i have found the following Problem:
There are about 50 Health-Mailboxes located on this database. Is it okay that i just move them to the new one with a Move-Request, or what do you suggest?

[System: EXCHANGE 2013, DAG]

Thank you very much

BR Basti
I'm getting sender rejected emails from emails I send to addresses at a specific host.

These all worked until a day or two ago. same thing happened yesterday with another email address, same host.

See attached,

Anything I can do about this?
I am Canadian based and have a bunch of email subscribers using a specific domain name (, my family name).

For these users, email has to work. Hosting is secondary. When email is not working appropriately, I get the call. I'm tired of getting the call, I need a solution...

My main base of subscribers are only using iPad email. This ticket is to find an email provider that can use my domain name (so we don't have to change everyone's email address), that works well with iPad email, blocks most of SPAM - but if possible can host a .NET website.

1. I started out with - good .NET services but email settings had to be changed a bunch of times because the ISP would block the email ports, and I had users using several ISPs. Email issues came up a lot, and users received a ton of SPAM.

2. I moved to, thinking that if I moved upstream to a DNS provider that things would get better - but they got worse. It never worked well with iPad default mail client, and had to install Outlook for iPad, retrain users etc... But was good at blocking SPAM.

The latest issue is that webmail works well (ie: no problem with Namespro), but email is being sent (with no error messages) but not being received by recipients. This means that there is something wrong with iPad or the iPad Outlook client. On all the users at the same time - obviously an iPad or Outlook update....

I am tired of this all, and would love any advice to know if there is a site…
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Hello all, I'm having issues with sending an email with an attachment lets say over 10mb. The mail server is locally hosted using Exchange 2010 and we use MessageLabs. The exchange server is set to 30MB send and receive and MessageLabs message size is set to its default 50mb. A test email with a 25mb file from an external email address was sent to an internal email address where the Exchange 2010 server is hosted and MessageLabs has let it pass through. The email must then get rejected when it reaches the Exchange server. Any help would be much appreciated.
GAL sync error: 0X8004010F
So far, every user is effected by this problem.   I am running exchange 2016 standard.  The GAL used to sync just fine.
SO far, everytime I manually sync it, I get this error, on every computer.
I know there's an issue because a new employee that I created a few weeks ago is not appearing in the GAL.
When I check OWA, the employee is listed in the GAL, but not in outlook 2013 or 2016.  I have tried using the "non-cached" option in Outlook, and that works fine,
the GAL shows updated.   Any idea's how to solve this sync issue?

Exact error: Task '' reported error (0X8004010F) : "the operation failed. An object cannot be found"
We are in a process of migrating to 0365 and we have 800 mailboxes to be migrated and also we have changed the email address of all the users and I was told the new address will be applied to the accounts only when the policies are applied in the 0365 and I was told only to apply the policies only after the mailboxes are migrated.
I have migrated some 8 mail boxes now and have not applied policies still

I tried logging into one of the mailbox that was migrated to 0365 cloud and I was not able to log in and it says “Your account has been temporarily locked to prevent unauthorised use. Try again later, and if you still have trouble, contact your admin.”

I have two queries.
Will it allow to log in only when the policies are applied?
Secondly, what will happen if I migrate a mailbox after the policies are applied?
Will it cause any problems and will the mailbox pick up the new address?

Thanks any help will be great.

On our Exchange 2007 and I have more than 800 user mailboxes. On every mailboxes, I would like to assign the following domain admins full access permission by going to Exchange EMC – Right click users –Manage Full access permission- Add the following administrators.

 Domain\Enterprise Admins
 Domain\Exchange organisational Administrators

 When I select to multiple users on the exchange 2007 EMC, I don't get an option for Manage Full access Permission from the EMC.

 Please let me know as how to give “Manage Full access permission” to the all 4 domain admins.
 Will this need to be done through Power shell Or is there any other easy way assigning the permissions to these admins.
 Any help much appreciated and tutorial will be great

0;; dkim=fail (no key for
 signature);; dmarc=none
Received-SPF: None ( does not
 designate permitted sender hosts)
Received: from ( by ( with Microsoft SMTP

What does the mean in the header?

It must not be protecting me in my two Hotmail accounts, I'm getting about 10-12 junk messages every day in each account.
The message rules do not work because they do not let me use the "name" of the sender only the sender's e-mail address. There is some beta version but that did not solve the message rules either.

I might get three messages from "New Car Warranty" but they are from three different e-mail addresses. Many example like that. I need to block or create a message rule so I can enter "New Car Warranty" as "what" is to be blocked or deleted.

These junk messages are not in the inbox they are in the junk box. Still trying to stop the flood gates.
I have installed fail2ban on an Amazon Linux 2 instance running Apache 2.4.  I can't start it up because I am using postfix and the default mta is sendmail.  I don't have sendmail installed and I don't want it.

I use google apps for my smtp server.

How can I change over to postfix or use google apps for my fail2ban mail option?

I have been asked to manage a distribution list in Microsoft Exchange 2010.  The list already exists and works, but the last time I made any additions/subtraction was from a Windows 7 Pro box.  Are there similar tools to do this from a Windows 10 Pro box (64 bit)?
send mail error on ubuntu 16.04
The original message was received at Wed, 25 Jul 2018 13:30:08 +0200
from localhost []

   ----- The following addresses had permanent fatal errors ----
550 5.1.2 Host unknown  (name server: host not found)
We recently migrate to on-premises to Office 365 Exchange. Ever since, my users keep getting this message to "allow this website to configure server settings, AutoDiscover redirect warning in Outlook".

I know I can suppress this message thru REGEDIT, but i dont want to that. I've rather fix this, by locating the cause of it. I think this maybe related to my internal DNS or somewhere in my domain controller that passing this autodiscovery.

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Hello I have a user that contacts in their email account is being spammed by a fake email account with their name but not their email account, so I am thinking that if all of the people on the sent list is from this users email contacts and then it list them as the sender it must have something to do with their account?  How is this happening?
Hi Everyone, our small SMB\company recently switched to hosted Office 365 Exchange based email. Before the switch, we had an "in-house" Exchange mail server.
We have about 10 or so domains registered for email delivery.

So here's the problem. Since switching to Office 365 our users are being bombarded with "Somewhat Legitimate" Phishing Emails that try and trick them into providing their logon credentials.
IE> Your account in box is full, click here to fix. Your account will be terminated if you don't click here and login .. and on and on and on.

I've mostly stemmed these by created rules in Mail Flow that block certain words and phrases contained in Subject\Body.

Thats said, any suggestions to better keep these emails out? This issue not nearly as bad when didn't host with Office 365.

I have an Exchange 2010 server Version 14.03.0399.000 which I believe puts it at Service Pack 3 rollup 21. I just did the rollup last week. This server has been running for years flawlessly until I ran this last rollup. Now for some reason, about 3 times a day the SMTP protocol just stops answering.

I believe I’ve got it narrowed down to something happening with the Microsoft Exchange Transport service. Before SMTP stops working I can restart this service, but after SMTP stops talking I can’t restart it, it just hangs.

If I perform a reboot on the mail server all is fine again for 6 to 8 hours.

Any help would be great
I updated exchange server 2010 a few days ago with monthly security rollups and have been having a problem every since.  Consistently, after several hours port 25 stops working.  When I try and send a test mail from the microsoft connectivity analyzer it says port 25 is not responding, and internal emaill sent on the LAN are to arriving either.  When I try and telnet on port 25 to the server it does not establish the connection.

I renamed the "transportroles/data" file so that exchange recreated it on reboot but that has not fixed the problem.

Outlook clients show outgoing mail in sent folder (not outbox) but mail is not going arriving (internally or externally) and not showing in exchange queues.  However, upon reboot all mail arrives.

No relevant errors in logs.

A reboot fixes the problem for several hours but the port stops responding again after that.

Any ideas on how to fix this without restoring from backup and not installing updates?

Thank you!

I trying to mount the DB but it always hang as Discounted and Synchronizing and another still mounting. See attachment for easy reference.

Now, 300 Users Mailbox jam in the CASHUB queue delivery.

HI Folks,

I wonder are there any experts out there that know how to analyse email header source. One of our clients received a bogus email that appeared to come from one of our staff members email address.. it did not. .. unless his email account was compromised.

I've asked the receive to send me the header of that bad email and they did. I put the message header into a Google Product called "Message Header Analyzer" and the results are attached.

My question: from this is there any way to determine the source of the email? Our domain is So did the come directly from us or is it from another source and just looks like from

Am I making sense here? Any help would sure be appreciated!


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.