Messages sent from Outlook 2016 (Mac) appears as drafts in sent folder
When users sends an email from their Outlook 2016 Mac it ends in sent folder as a draft.The mail does not appear like a draft in Outlook 2016 Mac but it does in Outlook for Windows and Outlook Web...
View ArticleExchange 2013 - 453 4.3.1 Insufficient system resources”.
Hi, I have 2 virtualized exchange 2013 servers. Other mail systems are reporting that emails are taking a long time to get processed by our Exchange server due to "453 4.3.1 Insufficient system...
View Articleunable to send message internally from exchange 2013
Hi All,We have Single AD site where we have Datacenter 1 and Dtacenter 2.In DC 1 we have 2 Mailbox/CAs server and in DC 2 we have single CAS/MBX server.All server are member of DAG.Now the issue is...
View ArticleMail Spoofing altough SPF / DMARC are deployed
Greetings,Please your support with this. We have a current mail spoofing attack. Some from an external IP is using our mail relays to send inbound spoofed messages.Ill copy the header and I dont...
View ArticleHardening Exchange 2013 Hybrid Receive Connector
Hi, When creating a hybrid deployment you are required to configure a recieve connector so Exchange online can send E-mail to Exchange on Prem. How do I secure this connector so that only office 365...
View ArticlePublic Folder forward option "Leave message intact" not working
I've seen a few older postings about this, but none of them have a solution. We've upgraded to Exchange 2013 and we're using Public Folder rules to forward messages. When we set the forward type to be...
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MAIL FROM: FAKE
Hello everybody, *I manage an a exchange cluster 2013 CU7 installed windows server 2012 platform in single role, CAS/MBX separately and I am having trouble with excess of spam out of my maibox servers....
View ArticleExchange Server 2013 - Removing part of email subject
We are running Exchange Server 2013 – Enterprise edition. Currently we have an inbound content filtering rule on our Symantec Messaging Gateway appliances to where when an email arrives from the...
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Email from Office365 can't reach On premise mailboxes in Hybrid Exchange 2010
Dear Exchange Expert,Currently we are implementing the Office 365 Hybrid in our environment which is running Exchange 2010. We have finished the HWC and we are now migrating the first pilot test...
View Articlewhy Email going to junk folder
Hi everyone, i have SharePoint server , i am configure it to send email via exchange . some users complain to me they are receiving emails in junk folder , i want to know the reason and prevent this...
View ArticleTLS Enabling
I have a client who is dealing some business with a bank and bank asked them that they need to have TLS enabled on their exchange server for them to send email to us and vice versa.We are using Cisco...
View Articlethe SMTP traffic from specific domain not hitting my server
Hi everyone, I have issue that i am not able to receive from particular domain, also there is no NDR , and also there no log in my server i am asked the sender to send me email in my Gmail account and...
View Article,-,,Remote in SMTP log
Hi,Can someone please tell me what ",-,,Remote" means in the SMTP send logs, I would expect to see a -Quit not a -Remote.I think its related to a resending problem we have but i'm not sure.ThanksLee
View ArticleExchange 2013 S/MIME setup
I currently have a 2010 exchange setup where we utlize S/MIME for all of our users. I am in the process of migrating over to Exchange 2013 but I'm hitting a road block with the S/MIME setup in 13....
View ArticleExchange 2013 Send Connector Logging broken
Hi, I have a client that is migrating from Exchange 2007 to Exchange 2013 and after the Exchange 2013 installation, I am not able to see any details of the send connectors in the right side details...
View ArticleExchange 2013. How to force SMTP authentication for Authoritative Domains.
I've found that in Exchange 2013 I am able to send email FROM a local account, TO a local account, and have the server not ask for any authentication. I want to lock this down, but I can't find a...
View Article500 5.3.3 unrecognized command issue
Hi all, My client has an issue where random senders within, and outside of the organization will receive a "Remote Server returned '500 5.3.3 Unrecognized command' error when sending mail to a certain...
View ArticleAutodiscover Vulnerability question - Exchange 2010 SP3 CU13
Hi, please can you let me know how you have protected against the "Autodiscover Enumeration Vulnerability". My current thoughts are around using an irule on an F5 LTM but am unsure if there is a...
View ArticleExchange 2013 - Unable to send email, Internally & Externally
Hi,I have new testing lab to play around with which is starting to drive me insane. I have exchange 2013 and outlook 2013. I can receive emails from external domains but I am unable to send emails...
View ArticleProbling with Throttling of Emails by Exchange 2013 servers
We are experiecing delay of emails for users because of the Throttlig on Exchange 2013 servers.This is causing company wide Delay and users are complaining as it takes a lot of time for the queue to...
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