Mobileme Silently Filtering Email To Spamcop.Net

According to Mac OS X Hints, if you’re trying to send an email to someone with a spamcop.net email address with your MobileMe account, chances are the message will never arrive, and you won’t be notified.

What’s worse, apparently if you’re sending the message to a distribution list, and only one of those recipients has an address at spamcop.net, nobody will receive the message.

Apparently the problem has been happening for months, since Apple moved everyone from .Mac to MobileMe. A participant in the Apple Discussions thread notes that it’s common for service providers to filter their outgoing mail by domain in order to avoid being blacklisted.