David Lemson's WebLog

Product Unit Manager, Exchange

David Lemson's WebLog

  • Configure Exchange 2003 to check recipients in SMTP protocol

    For years, people have been asking me, "how can I make Exchange work just like sendmail, where it rejects invalid recipients during the SMTP protocol?"  Sendmail has historically not had a directory, and so checking if a recipient was valid was...
  • Catchall vs Check recipients

    We get two different common requests for features that we have solutions for, but it's funny that they are incompatible. I accidentally discovered this on my own Exchange 2003 server at home. Feature 1: “Catchall” mailbox The idea with...
  • ResolveP2, RerouteViaStore, and its equivalent in Exchange 2003

    Recently I have encounted a number of people who asked what the ResolveP2 reg key in Exchange 5.5 was meant for, and how to emulate it in Exchange 2003. -- ResolveP2 in Exchange 5.5 ResolveP2 tells the Exchange server “when the server is...
  • How are you using the Windows 2003 POP3 Server?

    I saw a link on the “hellomate“ MS Exchange blog to a post singing the praises of the POP3 Server that comes in Windows Server 2003 and it reminded me that I wanted to write about this and ask people to comment or write, and tell me what you...
  • What's the story with WINS?

    Recently, someone asked the following question on an internal Microsoft distribution list: Can someone please outline the ways in which Exchange 2003 is dependant upon WINS..? Here's the answer I wrote back: Exchange 2003 is dependent upon three...
  • Sharing a domain between two Exchange orgs

    Luke asks : I am in the process of migrating from Exchange 5.5 to Exchange 2003 for a company that has multiple small (less than 5 users) branch offices. They want to migrate slowly, so here's my dilemma: The current Exchange 5.5 will still be active...
  • How are you using the Windows 2003 POP Server, Part II

    In a previous post , I asked people how they are using the Win2K3 POP server and what features they wish it had. One thing I'd like to get, especially from people who posted that they do use it today, is some more details on why and how they are using...
  • Home Portrait Studio

    KC mentioned the other day in her blog that we recently created a home photo studio. Leading up to this purchase, I spent a lot of time researching the easiest things to buy and I wanted to share it with others who might be looking to do the same thing...
  • Quiet MCE, Part Deux

    Earlier this year, after being a TiVo fan for quite a few years (I have the little plush toy they sent me in my window at Microsoft :-), I decided to see what Microsoft's solution was all about and installed a Media Center 2005 machine. Now that we've...
  • Want to work on mobile/web access technologies in the Exchange Team?

    See my post on the Exchange Blog for details on some job openings in my team. As a bonus, can you guess who I am channeling in the first paragraph? (hint: there's a lot of rhetorical questions)
  • The RFC 2821 "Covenant"

    In a recent comment , Mark Hicks asks: Is there a way to accept a message for an invlaid recipient and then delete it without generating an NDR to the (usually fake) sender? I still want to generate an NDR for my internal users when mail cannot...
  • IMF settings

    Several people have commented or emailed me asking me for my IMF settings, since I mentioned that I am using the IMF on my personal mail server. There are basically three settings for IMF: The Spam Confidence Level threshold for acting at the gateway...
  • Treo 650 and Exchange ActiveSync

    I am sorely overdue in posting, and I apologize about that. I will hide behind the sorry excuse that the vast majority of what I do nowadays is work on an upcoming release of Exchange that we aren't talking about yet, so I feel like I can't blog all that...
  • Who is David Lemson?

    I am a Group Program Manager in the Exchange product group. I've worked in Exchange my entire time at Microsoft, since early 1998. I've worked on quite a lot of different areas of Exchange in my time here: SMTP and mail routing, POP/IMAP, Exchange System...
  • Sierra Wireless threatens the norms of Cell Phones

    BusinessWeek Online has a dispatch from the floor of ITU Telecom World  (where High-Volume Exchange got a plug in Bill Gates' keynote ) which includes this, which I thought was interesting: But with a bit of help from Intel and Microsoft...
  • TechEd Day 1&2 from an Exchange perspective

    It’s been a huge couple of days for the Exchange team, especially the Exchange Mobile Sync team, which is in my group. In case you missed the news, at TechEd on Monday we announced Exchange 2003 Service Pack 2 as well as the Messaging and Security Feature...
  • HELLOMOTO

    Today, our second Exchange ActiveSync licensee announced their upcoming device with direct Exchange Server connectivity: Motorola and their upcoming A780 . Of course Motorola has several Windows Mobile devices (the now-shipping MPX 220 and upcoming MPx...
  • Blogging from TechEd: Exchange SP1 and IMF released

    I'm sure you've read it elsewhere, but here's one more link. It was hard to sit on this as people were commenting their lament over not being able to get IMF, but trust me, it's worth the wait. You can find both SP1 and IMF linked off of http://www.microsoft...
  • My favorite spot on the MS campus

    I was just reading a not-so-old post on Adam Barr's blog about his favorite spots on the MS campus and then a follow-up to it , and I thought I'd write about my favorite spot. The other day, we were coming back from a meeting in building 31 on our way...
  • Great MCE 2005 feature: Info on Movies

    It seems like every day I find a Media Center 2005 feature that makes me say, "wow isn't that cool!" Today's is "More Info" on Movies. First, when you want to pick something to watch, it treats movies separately, you can see what movies are on now, on...
  • Exchange Development at TechEd

    What have I been spending my time on this week? Polishing my presentation on Exchange Development! I'm presenting a MSG330:Exchange Development at TechEd San Diego this year, 5:30 pm Wednesday, room 32AB for those of you who are attending. Many of you...
  • Exchange 12 unveiled

    Where have I been? I have been so very bad at blog posting. I like to think that I favor quality over quantity :-), but I'm afraid I've been a huge slacker when it comes to this blog. But I'm going to try to change and blog more often, now that we're...
  • How do we decide what features make it in to Exchange?

    In a recent comment , Michel asks: How do you come up with a list of new features that are to be included in a new release? In a 'Meet the Expert' session here in the Netherlands last December, I discussed a problem for which ' the expert' knew...
  • HP Exchange 2003 Academies

    HP is starting a new round of Exchange 2003 Customer Academies and I wanted to give them some press, because I think they are a great way for customers to get deep knowledge about Exchange. I was involved in the development of the first (then Compaq)...
  • More from Michel on customer feedback

    In a comment to my last post , Michel says: It sure helps to demystify the process, but also shows there is no direct contact between developers and customers. PSS, a product group or reports form software tools are always 'in the middle'. I'm sorry...