mail.protection.outlook.com Delisting
We moved to another location and got a new ip from ISP and our exchange server is not able to send emails to some recipients getting .mail.protection.outlook.com error.user@domain.com...
View ArticleWhole IP Range Blocking in EAC
I need to find a way to be able to block whole IP ranges (160.0.0.0/8) instead of just subnets for them (106.0.0.0/24) in the Protection tab under the EAC. We are getting a lot more spam since moving...
View ArticleGuide for EOP for Exchange 2010 SP3
Hi, looking to setup Exchange Online Protection EOP for my on premise Exchange 2010 SP3 DAG.I'm find that all the official Microsoft guides and even blogs and such are all geared for either Exchange...
View ArticleMail flow configuration.
Scenario:Company abc.com mail server is hosted by a 3rd party hosting company. (mail.abc.com)I deployed an exchange 2013 server in the company abc.com.Created users similar to the users in the 3rd...
View ArticleExchange 2010 - Cannot receive/send large attachements - Did all the...
Hello All,I am using Exchange 2010 Standard Server - SP1. I am having difficulty send\receiving large attachments. I went through all the KB documents and solutions, but to still no avail. Can...
View ArticleData Loss Protection Rules - Canada SIN number and Drivers License Number
I am attempting to implement Data Protection rules in Exchange 2013.My first attempt was trying to implement the Canada Financial Data policy. I used the test sin number 046 454 286as given in a...
View ArticleExchange 2013 NDR Spam messages
Hi All, I have an Exchange 2013 server configured as Mailbox Role. The antispam solution is based on an external software (Kaspersky) that only tag emails as spam (doesn't reject emails). I have...
View Articletwo send connector smart host and MX delivery
Dear All user,I would also like the exchange server to send outbound email via these two servers (smarthosts) that are using out advanced filter to send out via the smarthosts and tenants who are not...
View ArticleUnable to send or receive mail
After many suggestions (that didn't fix the issue) I found a post that recommended logging. I enabled it and now I'm getting (on the Exchange 2013 server [a Server 2012 R2 machine]) the following...
View Article451 4.7.0 Temporary server error. Please try again later. PRX2
I'm getting the dreaded "451 4.7.0 Temporary server error. Please try again later. PRX2" error when receiving SMTP mail.does anyone know exactly what causes this error? there are many references to it...
View ArticleBizarre Exchange scenario - STARTTLS works on port 587, does not work on port 25
At wit's end - cannot figure this one out.On an internet facing Exchange 2010 without an edge server there are three receive connectors. One receive connector is set up to listen on port 587 on all IP...
View ArticleEmails destined for Outlook.com rejected with 4.4.7 - theory?
I have a client that is a Law Firm. They are trying to send emails to a company that uses Outlook.com as the host for their emails. Whenever my client sends an email to the company, the messages sit in...
View ArticleTracking Mail Flow " user cannot get mail from server"
Please help to tracking message from mail flow on ECP. Why user cannot get mail ?Delivery Report for User1@test.in.thPending3/19/2014 9:36 AM exchmb01.test.in.thThe message has been transferred from...
View ArticleSMTP DNS errors in Mailbox Transport Service
Users have reported that intermittently, inbound email is being returned to sender with an invalid domain name: #554 5.4.4 SMTPSEND.DNS.NonExistentDomain; nonexistent domain ##I'm seeing DNS lookup...
View ArticleAddress Rewriting - Sender and Recipient
Is there any way to perform address re-writing for BOTH the sender address and the recipient address for all outbound mail? We need to use it in-between two separate mail systems. Or is it just limited...
View ArticleFew mails are not reaching to a recipient while other are receiving the same...
HiI am facing very strange issue for few days. The email sent by a user to multiple internal recipient, is not reaching to one recipient, while others are receiving that email.Few users are facing this...
View ArticleSingle Server SPAM filtering
We recently upgraded to Exchange 2013. We have a single server setup with transport and mailbox roles on the same machine. We have noticed a dramatic increase in SPAM and I have started to notice our...
View ArticleDelivery is delayed to these recipients or groups
I'm receiving the below message when sending external emails to SOME people, but not others.A few things we've noticed:Anyone from our company can send emails to this person and it gets delayed (not...
View ArticleReceive Connector as an Open Relay
We have been using Spam filtering services from Postini for years and haven't had any issues.We have moved to using SpamSoap, and as well have not had any issues until just recently. They are asking me...
View ArticlePROBLEM OF MAIL FLOW
When i send messages from one account using owa,it shows that the mail sent,but the recipient does not get any message.i can not find what is the actual problem.And another thing is at first when i...
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