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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What exactly is this error bec keep receive it and how to check whether it has an impact to the exchanger 2010 server? I can’t sleep when I am on night duly. Tks.

SCOM2012 Alert: Cluster Service The Cluster service is shutting down because quorum was lost Resolution state: New

Alert: The Cluster service is shutting down because quorum was lost
Source: Cluster Service
Path: HQMBX3
Last modified by: System
Last modified time: 7/21/2018 12:24:44 AM
Alert description: The Cluster service is shutting down because quorum was lost. This could be due to the loss of network connectivity between some or all nodes in the cluster, or a failover of the witness disk.
Run the Validate a Configuration wizard to check your network configuration. If the condition persists, check for hardware or software errors related to the network adapter. Also check for failures in any other network components to which the node is connected such as hubs, switches, or bridges.
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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!

Hello, we have a client who is still using a Verizon email address in Outlook. Since AOL took over we had to change the incoming and outgoing server addresses to ( incoming and outgoing). But as of last week it is prompting me in Outlook that one of these setting is off now. Has anyone received any new information on Verizon email settings in Outlook?
Dear Wizards, when I run this script (ps1) to get all members from all Distribution Groups of our Exchange 2016 Server (Win2012R2)

$s = New-PSSession -ConfigurationName -ConnectionUri;
Import-PSSession $s;

$groupmember = foreach ($i in Get-DistributionGroup) {Get-DistributionGroupMember $i -ResultSize Unlimited | select Name, PrimarySMTPAddress,@{n='GroupName';e={$i.Name}} ,@{n='GroupSMTP';e={$i.PrimarySMTPaddress}} };
$groupmember | Export-Csv C:\_ListGroupmails.csv -NoTypeInformation;

Remove-Variable groupmember;
Remove-PSSession $s;

Open in new window

I got this error

Can you please help and suggest?  Many thanks as always!
Hello, I need to create 4 transport hub rules for 4 different email disclaimers that applies to people within a certain AD group or distribution list. i can get the disclaimers to work if i add the person direct on the "from people" condition in the rule. But when i try the condition "from member of distribution group" this wont work for some reason. i have made AD has replicated and waiting a few hours, still not getting any luck.

Any ideas?
I updated Exchange 2010 server(CAS/HUB). I saw Event ID 36887 is logged after that. Attached screenshot.

The following fatal alert was received: 46.

Hello Guys,

the reason for post this question here it is hub of experts and  I will get right direction. I  am after to install a Linux based email relay server  because I do not want to use my AIX box for this purpose which is currently in use. Googling  l this  comes with lots of option  Postfix Send mail MTA,.  But I am after  Linux Debian or free and easy version of Linux which can configure and used for email relay server.

Please can i have assistance  on this if some has experience to setup   email relay server Linux based ( free version )  and KB and linux software download link will be realy helpful.

Thanks in advance.
An organization I support needs to have a local Exchange 2016 server setup that will integrate with Office 365.

Please provide me with step-by-step instructions on how to do this.
I have an email sent from a harasser I am trying to get a restraining order against. He sent it to my former workplace. As of now, I only have a forwarded copy of the original email. I would like to obtain the IP address for my court case. Is this possible?

What is wrong in 1st attached screenshot? I send one mail and have got no failure (see 2nd attached file), in Telnet, but I cannot get the Mail. Where is the problem?
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This is using a SuSE Linux Enterprise server 11. This is about a mailing software called postfix. This mailing is working fine in production. Please see the (postconf -n) as follows:

alias_maps = hash:/etc/aliases
biff = no
canonical_maps = hash:/etc/postfix/canonical
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/lib/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin ddd $daemon_directory/$process_name $process_id & sleep 5
defer_transports =
delay_warning_time = 1h
disable_dns_lookups = no
disable_mime_output_conversion = no
html_directory = /usr/share/doc/packages/postfix-doc/html
inet_interfaces = localhost
inet_protocols = all
mail_owner = postfix
mail_spool_directory = /var/mail
mailbox_command =
mailbox_size_limit = 0
mailbox_transport =
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
masquerade_classes = envelope_sender, header_sender, header_recipient
masquerade_domains =
masquerade_exceptions = root
message_size_limit = 10240000
message_strip_characters = \0
mydestination = $myhostname, localhost.$mydomain
#myhostname =
mydomain =
mynetworks_style = subnet
newaliases_path = /usr/bin/newaliases
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/packages/postfix-doc/README_FILES
relayhost =
relocated_maps = …
Hi am experiencing problems since applying the July Microsoft Updates to my Exchange environments.

I have two separate production Exchange/AD environments experiencing is Exchange 2010 on Windows Server 2008 R2 (in a DAG configuration) and the other is Exchange 2007 on Windows Server 2008 R2 (single server).

Both environments were operating fine until applying the July 2018 Microsoft updates. Since then, when I receive Event ID 16002 and Event ID 16022 every six hours, the Microsoft Exchange Transport Service hangs and mail stops flowing. If I try to restart the Transport service, it does not respond and I have to reboot the server to regain mail flow.

Event ID 16022 appears 7 times when the Transport Service hangs, with the following different messages:
* A configuration update for Microsoft.Exchange.Transport.TransportServerConfiguration has successfully completed.
* A configuration update for Microsoft.Exchange.Transport.X400AuthoritativeDomainTable has successfully completed.
* A configuration update for Microsoft.Exchange.Transport.RemoteDomainTable has successfully completed.
* A configuration update for Microsoft.Exchange.Transport.AcceptedDomainTable has successfully completed.

These messages were being logged before the problem started, but the timing of them in the logs coincides with the failures (every 6 hours).

Is anyone else experiencing this problem since the July update?

Note: I have also a third separate Exchange 2013 …
I am looking for a SMTP mail relay server preferably in the Linux world with a gui.
Dear Wizards, we are setting a iRedmail Server (Ubuntu v16) and would like to synchronize all mail accounts to an AD server (Window Server 2008R2)

For example: similar to an Exchange Server, when we create a new mail user, it will automatically create an user in AD server

Is there any way to do it? Can you please give me some resources? Many thanks!
Dear Experts

We have been asked to deploy on premise mail server for which we are planning to go for zimbra network but before to that we have to design the network,  though this email server will be working for internal within main office and branch office as it is connected in mpls network but we also would like to send and receive mails to external domains following measures to be taken
1. if our server or internet goes down the sender mail should not get lost for us once the server or internet gets restored the mails should be delivered to our emails accounts.
2. our domain and ip reputation should be always good so that our messages gets delivered to the inbox on the recipient email
please suggest on how our email server to be configured have internal dns server and make it work as normal email server and for external we have to avail SMTP RELAY service with some service provider please suggest is this correct if not please suggest what service we have to avail for external email delivery with email security will be taken care.
I'm configuring postifx mail server in centos 7. i have facing problem related rate limit outgoing mails. my requirement is 3 mail every 1m. so what type of configuration in and i hope you will help me.

Thank you
Hi All
I am in the process of deploying exchange 2013. I have used your videos to learn about exchange 2013.

I have a vm environment in which i have 2 2012 DC's and 2 exchange servers. one is 2010 and the other is 2013.

My challenge is that i am unable to connect via outlook on exchange server 2013 itself. It first said there is no default gateway so i followed experts exchange suggestion to change registry which didnt help.

When i try to configure outlook Auto account setup is able to find my username with email address. After this i click next and i get a security certficate error indicating the name on the security certificate is invalid or does not match the name of the site. i click yes to proceed. After this it gives me the following

"The action cannot be completed. The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action"

If i click ok, i get a sid like number clicking ok results in logon to server with a cross sign. thus i am unable to proceed any further

Requesting assistance on this please. Thanks in advance for your assistance.

The suggestion from expert exchange was as follows
Click Start, click Run, type regedit in the Open box, and then click OK.
Locate and then click the following subkey:
On the Edit menu, point to New, and then click DWORD Value.
Type DefConnectOpts, and then press ENTER.
Retention policies not working.
Exchange 2016 CU8
I have a retention policy with 2 tags in it. Remove deleted items over 90 days and remove junk items after 21 days.
When I run

Get-MailboxServer | FT Name,ManagedFolderWorkCycle* -Auto

Name                                                                                                    ManagedFolderWorkCycle
----                                                                                                    ----------------------

It doesn't show anything but the server name.

When I run

Start-ManagedFolderAssistant –Identity 'User'
It looks like it runs, but nothing is removed. I have had these policies in place since January of this year. I know items are tagged from the day that the policy is applied.

So my question is, why isn't this working?


Our Kerio email is about to send e-mails but we cannot receive e-mails.
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How can I download my HOTMAIL messages inbox, sent and drafts onto my PC?
Im trying to renew  federation certificate on exchange 2013 enterprise dag but i get below error. Please see powershell cmnd i used and see the error i got.

[PS] C:\Windows\system32>$SKI = [System.Guid]::NewGuid().ToString("N"); New-ExchangeCertificate -DomainName 'Federation'
 -FriendlyName "Exchange Delegation Federation" -Services Federation -SubjectKeyIdentifier $SKI -PrivateKeyExportable $t

Thumbprint                                Services   Subject
----------                                --------   -------
<Thumbprint>  .......    CN=Federation

[PS] C:\Windows\system32>Set-FederationTrust -Identity "Microsoft Federation Gateway" -Thumbprint <Thumbprint> -RefreshMetaData
[b]Cannot update certificate until the federation trust is provisioned with STS.
    + CategoryInfo          : InvalidArgument: (:) [Set-FederationTrust], CannotUpdateCer...sionedException
    + FullyQualifiedErrorId : DB59689B,Microsoft.Exchange.Management.SystemConfigurationTasks.SetFederationTrust
    + PSComputerName        :[/b]

[PS] C:\Windows\system32>

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Please help me to renew,cert will expire in a week.
I am needing a revolving server system that changes IP address once it starts getting hits from sever filters. It needs to be seamless and use the same email address that we establish to send emails out from, but configures a different IP with every 50 to 100 emails. This is what we need to get a marketing job done and the email messages we want to send have to fit the character count specifics and font type. The subject line is the most important and the size cannot exceed X kilobytes for the total email to reach target market.
We increased  send/receive limit to 100MB on organization and server level to allow couple of users for sending up to 100MB emails. Currently there is no configuration on Recipient to stop all users from sending 100MB. I am going to run Get-Mailbox -ResultSize unlimited | set-mailbox -MaxReceiveSize 10mb -MaxSendSize 10mb to configure all current users(limit them to 10MB). What will be a good way, Policy or rule to configure for new users? while creating new users and take default 10 MB limit for send/receive.

1. Organization Level=100 MB
2. Server level=100MB
3. Recipient  level= not configured


We would like to increase sending/receive limit for senior staff in our organization. I increased on mailbox and connector level, so do i need to check something else. And also I dont want other users to send/receive message more than 10 MB.
I have a Exchange 2007 server that i need to set an exchange rule to permanently delete all mail in the inbox for a specific mailbox, any tips on the best way to achieve this?

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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