When Blocked Senders Go Bad

To ensure the safe and block lists work across all clients – Junk Mail MUST be enabled on the mailbox! SPAM is war, but sometimes even when you do the right thing, blocked messages can still get through and make it to the inbox. From the documentation and within Outlook itself, this doesn’t seem possible:Continue reading “When Blocked Senders Go Bad”

Where did my Remote Routing Address go?

Enable-RemoteMailbox is a powerful and useful command, sparing Exchange Hybrid admins the pain of creating and moving a local mailbox to Exchange Online. It does, however, have some issues occasionally – specifically when creating the required RemoteRoutingAddress. From the official documentation, you get the provided example: Enable-RemoteMailbox “Kim Akers” -RemoteRoutingAddress “kima@contoso.mail.onmicrosoft.com” This usually works, however,Continue reading “Where did my Remote Routing Address go?”

Go Commando when Scripting. Checking out the new Powershell Secrets Module.

  Everyone loves a good secret and anything to make it easier to store that secret and keep it from prying eyes is worth looking at. With that in mind, I was immediately interested when I read about the release of the new PowerShell Secrets Management Module. Note that the current module uses the built-inContinue reading “Go Commando when Scripting. Checking out the new Powershell Secrets Module.”

Renewing that pesky “Microsoft Exchange” certificate

    You know the one I am taking about. The self-signed certificate with a friendly name of “Microsoft Exchange” that each server issues by itself to itself. They are valid for 5 years , then suddenly, they are not. When on-premises was king, you rarely saw any questions about these. They just worked – andContinue reading “Renewing that pesky “Microsoft Exchange” certificate”

Authenticating trusted messages with Exchange and Office 365

One of the rather interesting side effects of moving your mailbox to Exchange Online is the change in behavior of the old trusty Safe Sender list. If if your mail client trusts only messages sent from a safe sender, all other messages will end up in junk mail. This is change from on-premises – where onlyContinue reading “Authenticating trusted messages with Exchange and Office 365”

Selectors: The Magic Sauce of DKIM

One question I see a lot is “How can I let 3rd party vendors send as our organization using DKIM?” It’s a lot easier than you think. The trick is in the selector. Per RFC 6376:  To support multiple concurrent public keys per signing domain, thekey namespace is subdivided using “selectors”.   Implementing this is pretty straight-forward, so let’s getContinue reading “Selectors: The Magic Sauce of DKIM”