[Dovecot] imap-login - where does the user get filled in from?

Sorry to ask such a basic question, but I finally got some major hurdles working for imaps on port 993 and Im getting the following when I try to connect from my iphone:

imap-login: Disconnected (no auth attempts in 60 secs): user=<>, rip=192.168.1.1, lip=192.168.1.22, TLS handshaking: Disconnected

Im using SQL and SSL over 993. I cant seem to find where my user comes from that its blank? Your help is appreciated.

Thanks

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