[rt-users] "RT could not load a valid user" issue

[Faith Senie]

We sent a reply to a customer from an existing ticket, and the  
customer replied to the email.  We had several hours of cron job  
failures this afternoon because of "RT could not load a valid user,  
and RT's configuration does not allow for the creation of a new user  
for this email (customer at example.com).  You might need to grant  
'Everyone' the right 'ReplyToTicket' for the queue General."

No problem, we got the cron job failures to go away by setting  
ReplyToTicket privs for Everyone.  The customer reply is now in place  
in the ticket.  But we're still getting the following errors in our  
logs after fixing that issue:

Mar 15 01:56:03 system RT: RT could not load a valid user, and RT's  
configuration does not allow for the creation of a new user for your  
email. (/opt/rt3/bin/../lib/RT/Interface/Email.pm:244)
Mar 15 01:56:03 system RT: Could not record email: Could not load a  
valid user (/opt/rt3/share/html/REST/1.0/NoAuth/mail-gateway:75)

They continue to appear every time our cron job runs to collect  
incoming emails.  We have ReplyToTicket and CreateTicket turned on for  
Everyone.  We have "--queue General --action correspond" in the  
argument list for rt-mailgate.  We are not running LDAP.  Why are we  
still getting these messages, and how do we get them to stop?

Faith