All developers can be contacted using his/hers mail alias. It's in the form accountname@pld-linux.org and, at least most of the times, should forward messages to developer's real mail account.
Developers can update their aliases using the users file placed in the CVSROOT module in our CVS repository. That file can also be used to find a person's real address, in case of a malfunction in our mail system, or other types of problems (SPF being one of them).