returned mail see transcript details original message received tue 19 jul 2005 11 00 57 gmt mail 8 atl registeredsite com 64 224 219 82 attention email returned remote server would could accept message registeredsite servers reporting happened source problem address undeliverable section labeled following addresses permanent fatal errors reason mail returned section labeled transcript session follows line beginning reason 550 host unknown transcript session follows 550 5 1 2 host unknown name server tabmark com host found