dovecot-sieve.log
Mar 19 20:10:02 lda(postmaster@gfeforum.com): Info: sieve: msgid=<20150319201002.06BCC128D4@mx.gfeforum.com>: stored mail into mailbox 'INBOX'
Mar 19 20:10:01 lda(postmaster@gfeforum.com): Info: sieve: msgid=<20150319201001.4BB44128D5@mx.gfeforum.com>: stored mail into mailbox 'INBOX'

what the error message i am getting below
Message not sent. Server replied:

    Requested action not taken: mailbox name not allowed
    553 5.7.1 <admin@gfeforum.com>: Sender address rejected: not logged in