SMTPRA and SMTPDA use 100% CPU Occasionally you may see the SMTPRA and SMTPDA services may use 100% of the CPU preventing mail from being delivered. SMTPRA and/or SMTPDA use 100% CPU, Mail is not delivered or received Follow these steps to resolve the problem: 1. Stop or Kill SMTPRA and SMTPDA. 2. Open the C:\Program Files\MailSite\Mailshell\backup folder and delete all the files from this location. 3. Open the C:\Program Files\MailSite\Mailshell\master folder and delete all the files from this location. 4. Open your incoming directory by default its located at C:\Program Files\MailSite\SPOOL\incoming. Check to see if you have any files that are 0 bytes in size. If so please delete these. If you have any orphan .msg files then delete/remove these. An orphan .msg file is a .msg file which has no corresponding .rcp file with the same name. 6. Restart SMTPRA and SMTPDA. If you have a backlog of mail it may take a while to be cleared however your services should continue to run normally after completing this procedure