Your message can't be delivered because you do not have permissions to send...
Dear All , I would to change this DSN message but I tried but cannot fix so that I would request to help in this regards."Your message can't be delivered because you do not have permissions to send to...
View ArticleSPF,DMARC,DKIM Implementation
Hello All,Need some help.We have an O365 Hybrid deployment with MX record pointed to EOP and centralised mail flow disabled. There are 2 Exchange 2013 Hybrid servers at on-premise with CAS+MBX roles...
View ArticleEmails going through passive mailbox servers
Dear Experts,Scenario : We have 2 sites A & B where Site A was holding active copies and site B passive copies of mailbox server. Now we have switched to as B as primary (holding active copies)....
View ArticleExchange photos blocked from being included in external emails
I'm looking to see if there is an option to exclude Exchange employee photos from being included when sending to outside our domain?We have a security element and we want to utilize employee photos in...
View Article450 4.5.0 no recipient succeeded from Exchange Online to Exchange 2013 on-prem
Exchange Online Sender receives this bounce-back: "Remote server returned '450 4.5.0 no recipient succeeded'I can't find much information about this NDR.I'm (Exchange 2013 on-prem) on the receiving end...
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Setting a "disclaimer" for a retired user in Exchange 2013?
We recently had a high profile user retire and we quickly hired a replacement.I want to keep the mail flowing to the new employee and create a disclaimer stating the retired user is no longer with the...
View ArticleAccidentally marked UPS message as spam - now forever ending up in "Spambox"
How do I stop emails from ending up in the "Spambox" folder.I accidentally marked a UPS notification as spam, and now it seems to be forever ending up in the "Spambox" folder. I added ups to my safe...
View ArticleS/MIME configuration for Microsoft Outlook on the web OWA
Hello I have a platform based on Windows servers, I have an Exchange 2013 mail server with an OWA web access application. I need to enable electronic signature of emails by accessing through OWA. the...
View ArticleAutodiscover DNS records for multiple domain names
Hello,I have one multi tenant server. Right now it is configured with self-signed certificate. I would like to move to a normal certificate. There are 5 domain names.I read somewhere some time ago that...
View Articlemx.google.com rejected your message
Hi,Good day, Please I've been trying to send email to gmail from my domain(****)but i i keep getting #ERROR! Exchnage serevr 2013Symantec Anti spammx.google.com rejected your message to the following...
View ArticleVulnerability - SSL Connection: SSLv3 CBC Mode Cipher POODLE...
Hi All,we have our exchange webmail hosted externally. recently we have got this message from our vendor say, we are under the risk factor(Vulnerability - SSL Connection: SSLv3 CBC Mode Cipher POODLE...
View ArticleDelivery report shows status of Pending for external address. Email sent to...
In Exchange Admin CenterWhen an email is being sent to both internal and external recipients the message tracking shows submitted and Pending, both internal and external recipient receive the email.My...
View ArticleMessage trace details
What is the meaning of below custom_data in Message TraceS:PCFA=OCAT|dkim=0 S:DeliveryPriority=NormalS:AMA=EV|engine=A|v=0|sig=201902060009|name=|file=|hash=|phash=...
View ArticleLast Error: Message deferred by categorizer agent.
Good day.I have Exchange 2016 CU8 installed. Two nodes setup with DAG. It works fine until I tried to enable the Malware Agent. Once it is enabled and Exchange transport service is restarted, all...
View ArticleMicrosoft Exchange Auth Certificate is going to expire
I was getting a warning says "Microsoft Exchange Auth Certificate is going to expire soon" like that.This certificate was self generated and would like to renew before expire and i had clicked on renew...
View ArticleLast Error: Message deferred by categorizer agent.
Good day.I have Exchange 2016 CU8 installed. Two nodes setup with DAG. It works fine until I tried to enable the Malware Agent. Once it is enabled and Exchange transport service is restarted, all...
View ArticleDelivery Status Notification - SPFDKIM.FailureNotification
Hi,Recently we getting the below "delivery status notification" email from one of the Bank email domain.Could someone help on this to get resolve. Please provide the detail step.Below is the error...
View Article403 4.7.0 encryption too weak 0 less than 128
When a customer from one company tries to email us, the email is not delivered and the customer eventually gets an NDR that shows the email failed with the following:Status: 4.4.7 X-Supplementary-Info:...
View Articlerejected messages
We running exchange 2013 on prem and in hybrid mode with office 365. We use barracuda essentials for spam and archiving. We have been seeing a lot of rejected messages in the logs of the Essentials...
View ArticleTemporarily block emails to a particular user
Hello,I want to block emails to a particular user but the rest flow. I can't change this users email address during that time. I need their account active. So if I want to block new emails going to...
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