I’ve gotten distracted again, but in a good way this time. I discovered what parsetools/yecc does recently and I figured it would be perfect to parse the commands and responses for an IMAP server and the IMAP client. I have proven to myself that this is true, but now I need to create a grammar file that fulfills the entire IMAP4 spec.
This is where leex comes in; as I need the data string that is either a command or a response to be tokenized into something that is reasonably easy to parse. I was workign with erl_scan:string/1, which was working adeqatly well, but after buying hte O’rielly book on Lex and Yacc I’ve come to the conclusion that leex needs to make a scanner for yecc to parse the tokens from.
I got the concepts of leex figured out last night just before I went to bed and ened up having regular expression and parsing dreams all night long. Annoying, but I solved a few of my problem that I knew about last night what I was dreaming 
In any case this will slow down the release of ErlMail-0.0.1 for just a bit, but it will solve all of the bugs that I mentioned in an earlier post. Fair enough trade off in my book.