By now, you've probably heard: Microsoft has officially joined the club. Following in the footsteps of Google and Yahoo, Microsoft has announced new requirements for high-volume and bulk ema…
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Bounce message. SMTP rejection. Deferral message. Non-delivery report (NDR). 5xx error. 4xx error. No matter what you call them, there are a zillion different kinds of them out …
It's time for another entry in the DELIVTERMS dictionary! Today, let's define JMRP. JMRP is the " Junk Mail Reporting Program ," the mechanism by which email s…
Microsoft's SNDS (Smart Network Data Services) , the reputation portal that provides deliverability feedback for folks sending to Microsoft Outlook.com/Hotmail, appears to ha…
When sending to Microsoft OLC (Outlook Consumer - i.e. hotmail.com, outlook.com, msn.com, live.com, etc.) domains, are you seeing this bounce message? Microsoft: 5.4.4 (unable to…
Looks like Microsoft has run into email authentication issues today. Specifically, the domain hotmail.com appears to have a broken SPF record wherein messages sent by Hotmail/Out…
Starting on August 16th, Microsoft seems to have stopped sending feedback loop reports. Microsoft's FBL is called the "JMRP" (Junk Mail Reporting Program) and multi…
Check it out! It looks like Microsoft has updated SNDS to provide a bit more info than they provided previously. In the "Comments" column, they're now including sna…
An updated version of this guide can be found here .
