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 11:00] – vikki | faq: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** |
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====== Why is my mail client showing SSL expiration warning? ====== | ====== Why is my mail client showing SSL expiration warning? ====== |
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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: |
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* **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) |
* [[faq:profile:how_to_install_root_cert_win_7|Windows 7]] | * [[faq:profile:how_to_install_root_cert_win_7|Windows 7]] |
* [[faq:profile:how_to_install_root_cert_macos|MacOS version 10.12 or older]] | * [[faq:profile:how_to_install_root_cert_macos|MacOS version 10.12 or older]] |
* [[faq:profile:how_to_install_root_cert_iPhone_iOS|iPhone iOS]] | * [[faq:profile:how_to_install_root_cert_iPhone_iOS|iPhone iOS below version 10]] |
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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: |
faq/email/why_mail_client_showing_ssl_certificate_expiration_warning.1634007641.txt.gz · Last modified: 2021/10/12 11:00 by vikki