Cron runs fine and the mails get sent but end up in the queue.
I've dropped plain smtp messages into the pickup folder and they get sent straight away no matter what the to and from addresses are. However the forum mails just sit in the queue.
Now my site is currently an IP address only and I dont have a domain name mapped to it. However the fact that simple smpt messages are sent without hassle and the forum one reside in the queue leads me to believe that the issue may be with the content of the forum mails?
Any help on this is appreciated as it seems to be an issue for many users