I use gmail and I'm not getting ANY to this account and on my other accounts, they're spotty at best. I'll get some directly to my journal, but not responses to comments I've left elsewhere or sometimes I don't even get notifications to comments left in the journal either. After talking to at least half a dozen other people and considering the variety of email servers used, I think it's more likely an IJ issue and not an issue with particular e-mail accounts. It probably has more to do with the clusters the journals are on, rather than the email server used.