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After update to Plesk Obsidian webmail shows invalid ssl warning for domains with no hosting

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Dinara Aspembitova
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Plesk for Windows Plesk for Linux kb: bug ext: le

Applicable to:

  • Plesk for Linux
  • Plesk for Windows

Symptoms

  • The server was upgraded to Plesk Obsidian;
  • Before the upgrade, there was domain without hosting, only email accounts, that were accessed through webmail via HTTP;
  • After the upgrade, webmail is redirected to HTTPS as a result webmail shows invalid ssl warning.

Cause

This is Plesk bug with ID PPPM-11114, which is planned to be fixed in one of the future product updates.
Follow the article to be notified when the bug is fixed - the article will be updated.

Resolution

As a workaround perform the steps below:

  1. Log into Plesk.
  2. Switch on hosting: go to  Domains > example.com > Hosting settings > click Change and set Hosting type to Website hosting ;
  3. Install the certificate for webmail according to the article How to secure the webmail with a Let's Encrypt certificate in Plesk ;
  4. Switch off hosting: go to  Domains > example.com > Hosting settings > click Change and set Hosting type to No web hosting.

Comments

7 comments

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  • Avatar
    Sathiya

    Thanks for understand the issue and workaround.

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  • Avatar
    Ralph W.

    The 3. step in the descriptions linked to by  How to secure webmail using Let's Encrypt in Plesk Onyx it says "Obtain a new Let's Encrypt certificate going to Domains > example.com > Let's Encrypt > Make sure the option Secure webmail on this domain is enabled > Click on Install:"

    In my Obsidian version 18.0.21 Update 3 there is no "Let's Encrypt" entry (the Let's Encrypt Extension is installed and activated for the domain), just a "SSL/TLS certificates" entry. Within that there's the domain SSL (including WWW.*) enabled and the wildcard *.domain.tld not enabled. Under "Advanced Settings" one can enabled "Secure Webmail" and "Secure Mail" (and it is), but it still doesn't work.

    Any other workarounds? Thanks.

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  • Avatar
    Anton Maslov

    Hi,

    Under "SSL/TLS certificates" select "Get it free" from let's encrypt and renew certificate with active checkbox "Secure webmail on this domain"

    0
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    Gianluca

    Hi, the page https://support.plesk.com/hc/en-us/articles/214528865 show:

    oops

    You're not authorized to access this page

    0
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  • Avatar
    Anton Maslov

    Hi,

    Fixed it, thank you for reporting!

    0
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  • Avatar
    Mesut Bilgili

    I installed Plesk obsidian on windows 2016 and webmail redirects to ssl , we don't want to redirect ssl. How can we disable redirect to ssl option for all subscription?

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  • Avatar
    Ivan Postnikov

    Hello Mesut Bilgili

    Since Plesk Obsidian for security reasons, webmail redirect to HTTPS is always enabled.

    The recommended approach is to get an SSL certificate to secure webmail: https://support.plesk.com/hc/en-us/articles/214528865

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