Problem with fetchmail and postfix RT4.4.3

please help me
when i send a mail to my RT i have this problem in my /var/log/fetchmail.log
fetchmail: couldn’t find canonical DNS name of ( Name or service not known
fetchmail: Query status=11 (DNS)
i need your help

Looks like a DNS lookup problem, so outside of RT really. If you replaced with its IP address ( in the fetchmail config, does it work then?

thanks for your help
look i have this problem
when i send an email to my “rt address” with from i have a ticket created succesufully
but when i send an email from an adress google mail to my “rt adress” i have any ticket and any message in my log file