sendmail trojan

[jnf]

hi, ive got a question, it seems several oss programs of late have been trojaned at 
the provider level- which leads me to wonder if this is a message 'read your source', 
which made me wonder, are these trojans obvious? as in if you just scanned over the 
source would you see them?
if anyone has a copy of some of the source that is trojaned, or knows where i could 
find some, it would be appreciated. thnx

j