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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 [2021/10/12 09:07] – 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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   * [[faq:profile:how_to_install_root_cert_win_7|Windows 7]]   * [[faq:profile:how_to_install_root_cert_win_7|Windows 7]]
-  * MacOS version 10.12 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.1634000855.txt.gz · Last modified: 2021/10/12 09:07 by vikki

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