it is possible that you use a firewall/router which does not let you use the identd. you need port 113 open for relay

for most networks it's no problem if you can't ident, it just uses the part in front of the @ of the email address you filled in.

make sure that the part in front of the @ of that email address is all lowercase without any special characters to be sure it works

If it ain't broken, don't fix it!