Hi there, I updated my FC2 Plesk 7.5.2 to 7.5.3. Now, for each incoming mail (on all domains of the server), a failure message is sent to the sender : <<< 451 Your mail has been rejected because the server you are sending to is misconfigured... Deferred: 451 Your mail has been rejected because the server you are sending to is misconfigured I'd try to reinstall QMail, but I've got error message : >rpm -q psa-qmail psa-qmail-1.03-fc2.build75050824.12 >rpm -Uvh --force psa-qmail-1.03-fc2.build75050824.12 error: read failure. There no file or directory. However I found this RPM in /root/psa/PSA_7.5.4/rpm_FedoraCore_2/base/ When I test to rebuild the configuration file, I've got error message again : >/usr/local/psa/admin/bin/mchk --with-spam segmentation error When I send a mail with horde, I've got this message : unable to connect to smtp server localhost:25 Please help me !