Over the past few days, multiple clients (and indeed, multiple ESPs) have seen delivery issues when sending to addresses at Fuse.net. Email attempts are bouncing with the error message, "553 5.1.8 Domain of sender address (bounce domain) does not exist." The error is not specific to any one bounce domain. And it has been seen by multiple email service providers. ExactTarget contacted Fuse.net regarding this issue, and they were told that as of today, the issue is resolved. Source: http://blog.exacttarget.com/blog/the-exacttarget-blog
