Erik de Castro Lopo wrote:

...my mail server is rejecting the message coming back to me... Nun.haskell.org really should have a reverse DNS entry

Ah, that is probably a casualty of the recent upgrade of the haskell.org server. As part of that process, control of the domain was moved from Yale to the community. I think someone at Galois is admin for the domain now, I'll see if I can get them to put the reverse DNS back in. I'm also creating a support ticket for community.haskell.org and taking the liberty of making you the "requestor". Regards, Yitz