We upgraded some of our servers last night from Red Hat 9 to Fedora. All of them went great, except for one. It's receiving all the incoming mail, but it's getting stuck in the mail queue. When I try to flush it out with /usr/lib/sendmail -v -q -C/etc/mail/sendmail.cf, I get an error on each mail message like: Running /var/spool/mqueue/i1KFVH2u009834 (sequence 1 of 45) mark... Connecting to local... Operating system error I searched the archives but I get redhat.com is temporarily unavailable. Please try back later. If you wish to place an order for Red Hat products, please call 1-888-REDHAT1.