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how can i prevent sending emails using telnet from outside

Hello ,i am looking for a solution since 1 month  , we have exchange 2010 server with local antispam ( integrated with firewall ) anyone can do telnet ( exchange public ip ) port 25 and can send emails...

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MX Records

Hi All,I have an Exchange 2013, all working just fine, lovely.I need to collect emails for another domain, which is registered on the Certificate, can I just point the MX records for this domain to the...

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emails sent through contact form on our website not being received by O365

We have a contact form on our new site that is delivering emails to our Marketing Director's personal email address, but not to his work email address. How do I go about troubleshooting/resolving this...

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Exchange DAG and Firewall

Hopefully this is an easy question.  Thanks for taking the time to look. At our firewall, we currently route our inbound SMTP traffic to a SPAM appliance. The appliance is being retired and we are...

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Exchange Server 2010: Undeliverable Message

Dear All,We are using exchange server 2010 to send a email to a client, however, we got this message back. How can i solve this problem?Thanks for your attention and...

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Restricions on Distributiongroups

Hi!We have a number of Distributiongroups called 'auto*something*' and we want all users not to be able to use these groups directly.However, these auto* groups are member of ordinary...

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external address sending mail thru server, maybe

This is an Exchange  2007 question, so if it needs to go somewhere else, let me know.I found evidence on my Exchange 2007 sp3 server that an external address is trying to send email thru my server. We...

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Client does not have permissions to send as this sender

I have an Exchange 2013 setup. I have enable POP3/IMAP4. Most of users can send/receive message via POP3/IMAP4 from Outlook 2010/2007.one my account shraddha.shrestha@kcl.com.np able to  receive...

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DR servers - mailflow question

So I have a main site with 8 Exchange servers and now a DR site with 4 Exchange servers all under the same DAG.  Two copies of DB at main site and a third passive copy at DR site.   The dr site DBs are...

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Error sent to Gmail because of 6TO4 Tunel

Hello,our Exchange 2010 Server cannot send to mx.google.com anymore.Our mails are rejected with this error messages:"[2002:d476:de46::d476:de46 12] Our system has detected that this message is likely...

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Exchange stops receiving SMTP emails when sending large amount of invoices.

We have an exchange server and a computer with an invoicing program loaded on it. At various times of the month, the invoicing program will go through our database and generate email invoices. The...

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Exchange 2013 Messages Stuck in Queue

Hello,I have an Exchange 2013 on-prem serer.  I'm noticing that certain messages get stuck in the queue.  They report back errors of "451 4.4.0 SMTPSEND.SuspiciousRemoteServerError; remote server...

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event 9217 source MSEXchange Tansport

 I have exchange 2010 and I got error with event number 9217 source MS Exchange Transport More than one Active Directory object is configured with the recipient addressIMCEAEX-ADCDisabledMail@mydomain....

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Send a notification based on sender's domain

Hey guys, Is there a way for me to send an automatic notification to external senders, based on their domain? For example user@domainA.com sends me an email and I want him to receive an email, that he...

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Emails don't received on Second domain.

Hi!I am facing a issue with receiving emails on 2nd domain. May someone suggest to resolve this issue.I have domain controller a.com (AD installed).Exchange server installed. I created user 1st@a.com...

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Not able to send mails to hotmail.com - Exchange 2010 server namespace mining

Dear,Since a couple of days one of our customers cannot send mails anymore to a hotmail account from an on premises Exchange 2010 environment. Contacting Microsoft tells us that the mail server should...

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External companies with Barracuda firewalls not able to deliver mail to our...

We upgraded to Exchange 2013 about a year ago. Since that time we've been having issues with certain companies having their mail delayed or rejected when sending to us. No problems us sending to them...

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[exchange 2013] Problem with multipart/mixed message

Hi,  After a brand new installation of Exchange 2013 I have problem with multipart/mixed messages:some emails that was correctly handled by the old 2007 Exchange are now "broken" and it seems to be a...

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blind copy transport rule

I want to set up a transport rule that blind copies all internal emails for all users to an external mail system. The email address for the external system is based on the AD samaccountname for each...

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DuplicateDeliver

We are having problems with emails being dumped because they have duplicate message ID's. The message are actually different emails. The sender, receiver, time stamp and content are the same, but the...

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