If you are seeing a message similar to "Procmail: suspicious rcfile message (/home/user/.procmailrc)" when running Procmail, it could be due to a problem with the Procmail configuration file, the permissions of the configuration file, or the syntax of the configuration file.
Here are some possible solutions to this issue:
Check the Procmail configuration file, usually located at ~/.procmailrc, to make sure that it is correctly formatted and that it does not contain any syntax errors. The ~/.procmailrc file should contain a series of rules that specify how Procmail should handle incoming email messages. Make sure that the rules are correctly formatted and that they do not contain any syntax errors.
Check the permissions of the Procmail configuration file to make sure that it is readable by the user running Procmail. Procmail will need to read the configuration file in order to process incoming email messages. Make sure that the ~/.procmailrc file has the correct permissions and that the user running Procmail has read access to the file.
Check the Procmail logs for any error messages or clues that may help to identify the cause of the issue. The Procmail logs are usually located in the /var/log/maillog file or in the syslog facility.
If none of these solutions resolves the issue, you may need to consult the Procmail documentation and online resources for further troubleshooting guidance. It's important to note that troubleshooting issues with Procmail can be complex and may require a good understanding of the Procmail configuration and the underlying system.