ok i have have been looking around and i couldnt find a solution for ymail.com accounts but after messing around a bit i got it to work. so pretty much set it to
imap with the server: imap.mail.yahoo.com to port: 143 with no security
then smtp server: smtp.mail.yahoo.com to port:587 with no security
hope this helps
imap with the server: imap.mail.yahoo.com to port: 143 with no security
then smtp server: smtp.mail.yahoo.com to port:587 with no security
hope this helps