I got 4 email alerts from my hosting company. I have only been with this hosting company about a year. I never got these with my prior host. They say I have certificates for cpanel, exim, courier-pop3d, courier-imapd all expiring. How important are these for websites that generally are like those in my signature? I sell nothing.
If you don't keep the cPanel one up to date and valid then when a user logs in with IE or Firefox they get told that there is an issue with the site with the default operation to leave the site, it's quite off putting. The others are to do with secure access to email, again you'll get warnings if the certificates have expired. It might be you've used a self signed certificate for these services, if that's the case just update it with a new one with a future expiry date and you'll be good to go. None of this is to do with SSL access to the sites hosted on the server.
it is only to access the cpanel and webservices. As you said, you are not selling anything and you dont need to input confidence to a future buyer.
SSL certificates for cpanel, exim are expiring. That means once they have been expires, you will get error prompts when trying to access cpanel, emails with https. There is nothing to worry. You can still surf cpanel and check emails securely with https even if the ssl certificates have been expires. All you need to do is to accept the warning and continue to browsing the websites.
To be clear then - since none of my pages on my sites are scure (https) visitors will get no errors as they browse my sites made of html and php pages?