In the ‘SliceManager’ click the DNS tab and set the reverse DNS to mydomain.com
echo mydomain.com > /etc/hostname
/bin/hostname -F /etc/hostname
/etc/init.d/sendmail restart
Then go to www.spamhaus.org to remove any mail blocks. You can not use a free email address to remove the block, but the email you use DOES NOT have to be from the domain/IP address that you are attempting to remove.
Check /var/log/mail.info you may have the error, ‘sm-msp-queue[7701]: dangerous permissions=42777 on queue directory /var/spool/mqueue-client/’, which can be fixed by entering:
chmod 0770 /var/spool/mqueue-client
