SMTP bounce code

[THY02K]

Not sure if this is the right place to post this question, but, seems like it's the closet category I can find. I'm not familiar with SMTP standards, but is there any SMTP mandated bounce/error code I can use in my application? I'm working on SMTP classification at the moment.

btw, I found this:
RFC 821 (http://www.bouncemailmanager.com/bouncemail.bolts&nuts/bm.smtp.return.codes.error.htm)

Reading up on it now and see if it contains what I'm looking for. Does it look like a resonablely complete list to you?

Norman FungI

[Mick]

all the implmemtation details and standards should be in teh apporved RFC. If 821 is the current approved RFC then let that be your 'bible'