It's not illegal. In fact, many Email providers are touting Spam blocking and filtering as a feature to attract more customers. I've had problems in the past with legitimate EMails from vendors at this and other Poser sites not getting thru, and I took the time to look into it. EMail is not Federal mail. Email companies can apply any criteria they want to how they handle your incoming (and outgoing!) Emails, as long as it's described or inferred by the guidelines of the service you signed up for. You're (as customer) only recourse is to take your business elsewhere, (although I'd raise heck with them over it in whatever depth I had time for if it was me). It's been established many many times that the owners of Electronic communications systems such as Email providers have the right to filter, read, and even publish such communications as they deem fit, unless they have a signed contract prohibiting them from such with the end-user. People assume there's some sort of divine or federal protections associated with Email due to the superficial similarity to the Postal system, but it just ain't so. Wish it were, but it's just not (until laws catch up to technology, or the Federal governments starts providing a US (or other countries) Postal Email service to citizens). Something worthwhile to start lobbying for.....