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faq:email:why_mail_client_showing_ssl_certificate_expiration_warning [2021/10/11 20:19] – created vikki | faq:email:why_mail_client_showing_ssl_certificate_expiration_warning [2022/03/07 11:17] (current) – vikki | ||
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====== Why is my mail client showing SSL expiration warning? ====== | ====== Why is my mail client showing SSL expiration warning? ====== | ||
- | AfterOffice | + | Lookafter |
* **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: |
- | * MacOS version 10 or older | + | * [[faq: |
- | * iPhone iOS | + | * [[faq: |
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). | ||
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+ | Reference: | ||
+ | [[https:// |