http://bugs.winehq.org/show_bug.cgi?id=16331
--- Comment #5 from Dmitry Timoshkov dmitry@codeweavers.com 2008-12-04 22:23:21 --- (In reply to comment #0)
Three possible NULL pointer dereferences in dlls\inetcomm\smtptransport.c, fixed by doing the parameter check first and using the checked variable afterwards.
Did you test under Windows that it really doesn't crash and checks for parameters being NULL?