I have generated Cloudflare SSL Origin Certificate for my mail server.
and it was successful when applying the SSL Origin Certificate to my mail server
Everything just fine
I have switched over the SSL/TLS on Cloudflare to full strict.
When I try to log in to my email account using SMTP/465, IMAP/993, POP3/005 on Outlook, it always gives me this kind of warning
Also, when I try to access the mail platform from web-based, the browser always remind me because the unsecured network and certificate
Can anyone explain to me briefly?
What’s going on with these kinds of warnings?
Although I had already applied the SSL Origin Certificate to my mail server.
Is it because I’m using a Free SSL Certificate from Cloudflare or what?
Cloudflare do not support email protocols, so all hostnames for SMTP, POP, IMAP etc need to be . The Cloudflare Origin certs should only be used with Origins behind the Cloudflare proxy, so the should not be used on SMTP, IMAP etc servers.
In this case, I have to purchase an SSL certificate that could cover my SMTP, IMAP, POP Services on my mail server through a third trusted SSL provider, right?
The only thing that differentiates certificate authorities is where they are trusted, how you use them, and the pricing model.
Let’s Encrypt cannot be beaten on price (but you should make a donation or consider sponsoring their work.
They are one of the only CA’s that offer fully automated certificate issuance, but as certificate lifetimes continue to decrease this is likely to change.
Certificate compatibility then is the only place where commercial CAs can compete with LE. That is a call you need to make yourself, but in almost every situation you will commonly encounter LE certs will be supported.
. The Cloudflare Origin certs should only be used with Origins behind the Cloudflare proxy, so the should not be used on SMTP, IMAP etc servers.
