I have a vps with a shared IP. Now, I want use SSL/TLS for the mailserver. I was wondering what kind of certificate I need for the mailserver. So, do I need to issue a certificate on the hostname? because I get an untrusted error in Outlook, if I change the settings. I think this is the same issue as when I log in in the control panel of plesk, I get an error message, that the certificate is not trusted, because it not sign by a CA. I know that plesk issue a self signed certificate. So again. I don't know if I have to issue a certificate on the domain, however I think then i will get also an error, because hostname and domain name are not the same. Can somebody support me?
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You should ask on http://serverfault.com/ – Simone Carletti Jan 28 '16 at 09:42
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ok thank you for your advice – Lorenzo Varano Jan 28 '16 at 09:44
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Yes, You will have to purchase SSL certificate for the hostname, so that your all client will be use your server hostname in mail client setting with the SSL connection
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Thank you for your answer. But how I can verify then the hostname. Usually you need an e-mail in the issuing process. – Lorenzo Varano Jan 28 '16 at 15:04