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faq:email:why_mail_client_showing_ssl_certificate_expiration_warning

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faq:email:why_mail_client_showing_ssl_certificate_expiration_warning [2021/10/11 20:19] – created vikkifaq:email:why_mail_client_showing_ssl_certificate_expiration_warning [2022/03/07 11:17] (current) – vikki
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 +[[:start|Home]] > [[:faq|FAQ]] > [[faq:email|Email]] > [[faq:email#email_clients_mobile|Email Clients & Mobile]] > [[faq:email#mail_client_issues_and_troubleshooting|Mail Client Issues and Troubleshooting]] > **Why is my mail client showing SSL expiration warning**
 +
 ====== Why is my mail client showing SSL expiration warning? ====== ====== Why is my mail client showing SSL expiration warning? ======
  
-AfterOffice uses SSL certificates that are issued by [[https://letsencrypt.org/getting-started/|Let’s Encrypt]] for all of our email servers, to support the secure SSL connections. Let's Encrypt has two main root certificate:+Lookafter uses SSL certificates that are issued by [[https://letsencrypt.org/getting-started/|Let’s Encrypt]] for all of our email servers, to support the secure SSL connections. Let's Encrypt has two main root certificate:
  
   * **DST Root CA X3**: An older root certificate that are trusted and recognised by older devices (e.g. Windows XP prior to SP3, MacOS below 10.12.1) and older mail clients (e.g. Windows Live Mail)   * **DST Root CA X3**: An older root certificate that are trusted and recognised by older devices (e.g. Windows XP prior to SP3, MacOS below 10.12.1) and older mail clients (e.g. Windows Live Mail)
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 Users who are using the following devices can try to install and trust the new root certificate manually. Users who are using the following devices can try to install and trust the new root certificate manually.
  
-  * Windows 7 +  * [[faq:profile:how_to_install_root_cert_win_7|Windows 7]] 
-  * MacOS version 10 or older +  * [[faq:profile:how_to_install_root_cert_macos|MacOS version 10.12 or older]] 
-  * iPhone iOS+  * [[faq:profile:how_to_install_root_cert_iPhone_iOS|iPhone iOS below version 10]]
  
 If the above does not work for your device, you can opt to: If the above does not work for your device, you can opt to:
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   * Use a newer device with an updated OS/system, or   * Use a newer device with an updated OS/system, or
   * Disable SSL connection on your mail client (not recommended).   * Disable SSL connection on your mail client (not recommended).
 +
 +Reference:
 +[[https://letsencrypt.org/docs/dst-root-ca-x3-expiration-september-2021/|DST Root CA X3 Expiration]], [[https://letsencrypt.org/docs/certificate-compatibility/|ISRG Root X1 Certificate Compatibility]]
faq/email/why_mail_client_showing_ssl_certificate_expiration_warning.1633954763.txt.gz · Last modified: 2021/10/11 20:19 by vikki

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