The forum is currently unable to email to gmail/googlemail addresses and is not sending activation emails to new users with those addresses. If you have registered in the last 10 days with a gmail/googlemail email I have activated your account. Sorry for the inconvenience, we hope to have this problem resolved shortly.
Sorry about the delay sorting this out. I’ve had a couple of other issues come up on the server recently and that’s delayed me. I’ve got things set up the way that I think Google want them but mail is still being rejected. I’m not sure if that’s due to DNS caching and needing time to replace all the replicas out there. I’m going to try again tomorrow to see if things have cleared up at all.
After waiting for DNS replication to take place it looks like the problem is fixed. Gmail is now accepting email from the forum server again.