During Friday's Exchange 2007 Webcast on Managing Anti-Spam I made a couple of "boo boos".
The first one is in reference to Sender ID. I cautioned everyone on choosing to delete or reject messages because not everyone has implemented the DNS records necessary for this yet. The reason for this was if no record was found, then the check would fail and the message would not make it through even if it was from a valid sender. This is INCORRECT! In actuality, if no record is found in DNS, then no check can be performed and therefore it doesn't fail. The message will be allowed in.
The second one is more around mentioning actual company names or websites and such. I have a rule that I don't mention actual companies because I've learned the hard way that it's not a good idea. I used examples like "blocklistprovider.org" and "safelistprovider.org" when referencing Block List Providers and Safe List Providers rather than actual companies. In another example, I made a big boo boo and mentioned an actual company when it came to words to filter on for spam. I do apologize for doing that as I did not mean to disparage this company in any way as the company itself does indeed make a valid product that is important for their customers. I hope I did not offend anyone with this, and if I did, once again, I'm very sorry.
I am still working on the Q&A Log for this part (as well as some of the past ones) and will get them posted as soon as I can. Thanks for your patience!