On October 19, 2021, we have enabled single-sign-on for our Plesk Support Center to provide a seamless login/account experience. This implies that you’ll be able to use a single account across any of our web-facing properties.
If you had already registered your account at Plesk 360 (formerly known as My Plesk) please use one for login. Otherwise please re-register it using the same email address as your existing Zendesk login (support account). It’s essential that you use the same email address on our support center to ensure that your tickets stay attached to the same account.

Mail client shows warning connecting to Plesk mail server: the server to which you are connected uses a security certificate that can not be verified. The main destination name is not valid

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2 comments

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    Michael Abram

    As I read this article, I'm understanding that my IMAP, SMTP, and Hostname all need to be the same; i.e. mail.example.com. Is that correct? I feel that something is missing because I should be able to have my hostname set to s1.example.com, IMAP to imap.example.com, and my SMTP set to smtp.example.com.

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    Ivan Postnikov

    Hello @Michael Abram,

    > As I read this article, I'm understanding that my IMAP, SMTP, and Hostname all need to be the same

    They should be the same and you should name the same domain name, for which certificate is specified at  Tools&Settings > SSL/TLS Certificates Certificate for securing mail (for Plesk Onyx).

    For Plesk Obsidian, which will be released soon, SNI for mail was implemented and different domains may have different certificates for securing mail server.

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