Failed start exim4. service

Hi there. When starting the PC, the message "failed to start exim. service" appears. What happens is that the Internet does not work on my PC. I have verified that the exim4 exim-dev exim-daemon-heavy packages are not installed. Is it possible that I need to change the host advertising option or install a new certificate? Thank you. All the best.

Lo que sucede es que el Internet no me va en el PC. Los paquetes exim4 exim-dev exim-daemon-heavy he comprobado que no estin instalados. Es posible que tenga que cambiar la opciin de anunciar el hosts i instalar un nuevo certificado? Gracias. Un saludo.