Let us examine every troubleshooting aspect of the error /usr/lib/postfix/sbin/smtpd: bad command startup — throttling. At Bobcares our Server management support services can give you effective troubleshooting tips to manage the error easily.

 Troubleshooting tips for the /usr/lib/postfix/sbin/smtpd: bad command startup — throttling error

Follow the troubleshooting tips given below by our Server management support services as a solution to manage the error:

• Firstly, we have to ensure the active running of the dovecot and perform a check on the /var/log/maillog for any issues.

  The goal of this configuration is to ensure that Dovecot is properly launched, functioning, and configured. If we have recently transferred the mail server to a new operating system, this can cause a lot of issues, especially with Dovecot.
• Start the postfix daemon again to fix the error usr/lib/postfix/sbin/smtpd: bad command startup — throttling. Perhaps postfix is simply confused and tries to use removed files. Postfix should write logs after being restarted, allowing us to debug the situation. Also, check the output of this command :

  # lsof / | grep 'DEL

  It displays opened files (=in use) that are removed; so, when we update a package, we should check the result of this command and restart the associated programs to make the apps use the new updated version.
• We can try to Upgrade the kernel and rebuild postfix as troubleshooting for usr/lib/postfix/sbin/smtpd: bad command startup — throttling error.
• Verify that the port is listening to the server. Or in configuration files, look for syntax mistakes.
• Alternatively, we can firstly, check whether the postfix is working(systemctl postfix status). After that check, if there are any errors in the Postfix logs. postfix (journalctl -b)
• Another troubleshooting tip is to Edit /etc/sysconfig/postfix/main.cf.After that  Find:

  smtpd_sasl_path. After that remove the line with it and restart postfix.
• For the next troubleshooting step for usr/lib/postfix/sbin/smtpd: bad command startup — throttling error; run the following commands to see if the situation improves when SASL is entirely disabled. Perform the following commands:

  sudo su -
cd /etc/postfix
cp -p main.cf main.cf.original
sed 's/.sasl.//' main.cf | sed 's/.tls.//' | sed 's/.ssl.//' > main.cf.without_ssl
mv main.cf.without_ssl main.cf
systemctl restart postfix.service

  Then check what happens – especially, whether it allows issuing commands after connecting to the server’s port 25 through telnet.

[Need assistance with similar queries and more? We are here to help]

Conclusion

To conclude we have now learned about some of the most effective troubleshooting tips for usr/lib/postfix/sbin/smtpd: bad command startup — throttling error