I'm a support enginer in CSS . I was working with a customer who reported a mail loop error for a specific domain like contoso.com . This error was only observed in large emails. Yeah that’s really mysterious until you figure out that the mail loop is due to size restriction on the Send connector...

Update 2/5/2013: We have also uploaded a sample that will work on Exchange 2010 servers, you can find it here . What is a Transport Agent? Transport agents allow Microsoft, developers in your organization and third-party vendors to hook into the Exchange transport pipeline with their code to process...

Update 2/26/2013: In response to your feedback, we have also raised the limit for Office 365 for Education plans (A2, A3, A4) to 10,000 recipients per day. In response to feedback from our customers, we have increased the recipient rate limit within Office 365 Enterprise (E1, E2, E3, E4, K1, and K2...

This summer, Microsoft introduced the new Office , including the new version of Exchange Server 2013 and Exchange Online, which provides businesses with robust communication and collaboration capabilities available on-premises or in the cloud. When you talk about messaging and collaboration, especially...

It’s not easy being a spam cop. But the folks on the Forefront Online Protection for Exchange (FOPE) team love it! Their passion for being investigators and transport experts has translated into measurable impacts to help safeguard customers’ inbound, outbound and internal business mail from spam, viruses...

Exchange Message Tracking Logs hold a wealth of information about email messages during transport. Utilities that can parse message tracking logs and analyze them for administrators have historically been important tools when troubleshooting certain mail flow problems. With Exchange 2010, the message...

Accepting inbound mail for a DNS domain and relaying it to responsible mail hosts outside your Exchange organization was a simple process in Exchange 2003, albeit one that required some explanation, which was discussed in the following articles: KB 321721 How to share an SMTP address space in Exchange...

Today is the magical day when parents tell their tucked-in children the story of the Squeaky Lobster . So here's a Squeaky Lobster-ish post to celebrate the day. In Exchange 2007, we introduced transport rules – a powerful feature that allows you to inspect different parts of a message such as sender...

Starting with Exchange 2007, installation of the current version of Office Filter Packs is a prerequisite. For Exchange 2007 and Exchange 2010 RTM , the pre-req was 2007 Office System Converter: Microsoft Filter Pack . In Exchange 2010 SP1, this was updated to Office 2010 Filter Packs . The filters are...

You may have noticed a change in the behavior of the Safe Senders list within Outlook starting in Exchange 2010. Users can no longer add accepted domains to Outlook’s Safe Senders list. Figure 1: Adding an accepted domain to Outlook's Safe Senders list This was done as an anti-spam deterrent as we have...

Background The Exchange Store Driver is a core transport component which lives both on the Mailbox server role (as the mail submission service) and the Hub server role. It is responsible for: Retrieving messages from the mailbox server that have been submitted by end-users and submitting those to the...

Update 3/31/2011: The updated Exchange 2007 SP3 RU3 has been released. See Announcing the Re-release of Exchange 2007 Service Pack 3 Update Rollup 3 (V2) . 3/30/2011: We posted a status update for this issue. See Exchange 2007/2010 Rollup 3 Status Update . Over the weekend, the Exchange Product Group...

A question that comes up often enough to merit a post is: "How does one block read receipts from leaving or entering my org?" Good question. I'm glad you asked! And to answer that we need to go into the way back machine to Exchange 2003. In Exchange 2003 we used the IIS SMTP engine. As you know all the...

Last year, we announced the Exchange Remote Connectivity Analyzer and usage continues to grow as people become aware of this web site. Today, we are releasing a new version which will help us reach an even wider audience... We now support 10 additional languages! Here is the list of all the languages...

Ever so often, an Exchange administrator faces a situation where messages that fit specific criteria need to be removed from a large number of mailboxes or from Exchange transport queues. The need may arise due to some sort of mass mailing, a message sent accidentally to a large distribution group or...

The ForeFront product team has just released Software Update 1 for Microsoft Forefront TMG SP1 that fixes the issue with ForeFront TMG 2010, ForeFront Protection for Exchange and Exchange 2010 SP1 on the Edge Transport server role. More details in Software Update 1 for Microsoft Forefront Threat Management...

Starting with Exchange Server 2007, we added protection for Exchange data paths to Client Access Servers using SSL . SMTP communication between transport servers is also protected using TLS . To ensure this protection is enabled out-of-the-box, Exchange setup creates self-signed certificates and enables...

One of the things about Exchange 2010 that many of my customers find very attractive (and I have to agree with them) is the idea of the multi-role or “all-in-one” DAG server. This means having all three of the core Exchange 2010 roles installed on all of the servers in the DAG – Mailbox, Hub Transport...

EDIT 10/18/2010: Removed the reference to upcoming fix (no fix current planned) . Some customers are finding that when they try to replicate their public folder content to Exchange 2010, it will not replicate. Looking at the application log, you may find an event like this: Log Name: Application Source...

To enforce messaging policies, organizations frequently need to inspect messages based on different properties such as sender, recipients, subject, headers and attachments, and take the necessary actions such as adding disclaimers, adding headers, adding a prefix to the message subject, setting or modifying...

When constructing Transport Rules, it is pretty straight forward to define a set of conditions and then specify the action to take when those conditions are met. It is easy to overlook an optional third component: Exceptions. Several customer questions that I have come across for how to enforce more...

Early 2008 we have posted a blog entry with a VB script that generates some pre-canned reports that are based on message tracking logs. The script has proven to be useful in understanding Microsoft's Exchange work load and guide some design decision for Exchange 2010. This script was developed by Todd...

You requested it... and we delivered it in Exchange 2010! One of the most requested items in exchange 2007 was something like this... ...we have 5-12 external domains that we need to allow some users to send to, but prevent sending to all other domains... Or like this... ...we need a way to allow everyone...

The Delivery Reports feature which was introduced in Exchange 2010 enables both Information Workers, and administrators to view delivery status of messages and discover answers to questions such as: why a message was not delivered, where a message is now, who received a message, why a message was delivered...

MailTips brings together information from many sources; its value to users is taking what can be complicated on the backend and presenting it very simply. This does mean, however, that there are a few different places to look when troubleshooting MailTips. This post outlines some basic troubleshooting...