Otrzymałem odpowiedź od Yahoo:
Quote: We are very sorry for any inconvenience caused by this situation.
By default, we block access to Yahoo Mail from outdated apps that could leave your account vulnerable. If we sent you an email indicating that your app is using outdated security protocols or you're unable to log in from an older app, you still have several options available to you.
Password errors and access issues
If you try to use Yahoo Mail in a third-party email client using less secure sign-in technology, you might get a "Server password has changed" or an "Authentication failed" error message. This is because those email apps use outdated security protocols and we've disabled access to them by default now.
Use a secure option to access Yahoo Mail
Don't worry! You have options to keep using your Yahoo Mail securely and without interruption:
Use the Yahoo Mail website: mail.yahoo.com.
Install the Yahoo Mail app on your Android or iOS devices.
Use an app password.
Keep your current application, but follow the steps below to ensure it's syncing with our secure sign-in method. Please note, not all third-party email apps are supported.
Continue using third-party mail apps securely
Use an app password
If you use Yahoo two-step verification, Account Key or an older email app, you may need to use an app specific password to access Yahoo Mail. Just remember, app passwords are only valid for the app they are created for and remain valid until you sign out or remove access to the app. At that time, a new app password will need to be created.
Learn how to generate third-party app passwords.
More information on specific third-party platforms
If you prefer to continue accessing your Yahoo email on your current third-party email application, including the default email application on your mobile phone, please see details below on how to ensure it's syncing with the latest secure sign-in method.
Access mail via Apple iOS
Remove your Yahoo account and re-add it to the Apple email app on your mobile device. When you re-add the account, look for the Yahoo provider logo to trigger the secure sign-in method.
Access mail via Apple Mail on Mac OS
Remove your Yahoo account and re-add it to Apple Mail on Mac. When you re-add the account, look for the Yahoo provider logo to trigger the secure sign-in method.
Access mail via Gmail App on mobile
Remove your Yahoo account and re-add it to Gmail to trigger the secure sign-in method.
In the top right corner, tap the Profile icon.
Tap Manage Accounts to remove it.
Tap Add another account to re-add it.
Tap Yahoo to set it up again.
Read more from Google on removing and re-adding accounts.
Access mail via Outlook.com
Use an app password for initial sign in. Learn how to generate third-party app passwords.
Go to Settings in the upper right | select Account Settings.
At the bottom of the pane, select View all Outlook Settings.
Select Mail | Sync Mail.
Read more from Microsoft on how to connect accounts.
Access mail via Outlook Desktop
As of May 2020, Outlook Desktop does not yet support the Oauth2 secure sign-in method for Yahoo accounts. Yahoo members should generate and use a third-party app password to sign-in securely.
Access mail via Outlook for Mac
As of May 2020, Outlook for Mac does not yet support the Oauth2 secure sign-in method for Yahoo accounts. Yahoo members should generate and use a third-party app password to sign-in securely.
Access mail via Samsung Mail
Remove your Yahoo account and re-add it to the Samsung email app on your mobile device. When you re-add the account, look for the Yahoo logo to activate the secure sign-in method.
Open Android Settings.
Tap Accounts and backup | Accounts.
Remove existing email account then re-add.
Tap Add account | Email.
Tap the Yahoo logo to activate the secure sign-in method.
Read more from Samsung on removing and re-adding accounts.
Access mail via Thunderbird
Remove your Yahoo account and set it up again in the Thunderbird email client.
Go to Tools | Account Settings.
Select your account in the list.
Go to Account Actions at the bottom left.
Click Remove Accounts.
Click Add Accounts and type in the email address and password.
- Thunderbird will then automatically activate the secure sign-in method for your account.
Read more on removing and re-adding accounts in Thunderbird.
Access mail via Windows Mail
Remove your Yahoo account and re-add it to Windows Mail to activate the secure sign-in method.
From the navigation pane, click Settings.
Click Manage Accounts | select Add Account.
In "Choose an account," tap the Yahoo logo to activate the secure sign-in method.
Read more on removing and re-adding accounts in Windows Mail.
Access mail via Other Applications
If possible, use the Yahoo Mail app or mail.yahoo.com. Since Yahoo owns these services, we can ensure you're always using the most secure sign-in technology when accessing your email.
If you'd prefer to continue using your non-Yahoo email application, try removing and re-adding your account. Look for the Yahoo logo when you go to set it up again to activate the secure sign-in method.
If removing and re-adding your account does not work, generate a third-party app password to access your account.
Thank you for your understanding and your efforts.
Prawdopodobnie przyczyna jest taka sama, jak z obsługą moich skrzynek pocztowych w firmie hostingowej, gdzie posiadam swoje strony WWW. Końcem roku 2019 miałem ten sam problem właśnie z tamtymi skrzynkami mailowymi i otrzymałem wtedy odpowiedź od administratora firmy hostingowej:
Quote: Problem jest związany z wykorzystywaniem oprogramowania, które nie zawiera obsługi protokołu TLS 1.2, lecz starszych 1.0 i 1.1, które zostały wyłączone. W tym przypadku należy zaktualizować oprogramowanie (system, klienta pocztowego), do najnowszej możliwej wersji.
Protokół TLS w wersji 1.0 oraz 1.1 został wycofany ze względów bezpieczeństwa. Podobny krok wycofania wskazanych wersji protokołu szykowany jest przez firmy Apple, Microsoft, Google oraz zostanie wprowadzony w życie od początku 2020 roku.
W celu dalszego korzystania z klienta pocztowego Microsoft Outlook 2007 niezbędne będzie wykonanie następujących operacji zgodnie z artykułem pomocy firmy Microsoft:
https://support.microsoft.com/pl-pl/help/3140...nd-tls-1-2-as-default-secure-protocols-in-wi#
Problem jest związany z faktem, iż starsze systemy operacyjne, nie są przystosowane do pełnego wsparcia dla protokołu TLS 1.2, na rzecz starszych TLS 1.0 i TLS 1.1, które zostały wyłączone przez nas w tym roku a w następnym przez dostawców oprogramowania. W tym przypadku nie jesteśmy w stanie już pomóc.
Poradziłem sobie z tym w ten sposób, że maile z tamtych skrzynek odbieram i wysyłam bez szyfrowania. Całe szczęście, że dopuszczają taką możliwość na swych serwerach.
Wygląda na to, że Yahoo prawdopodobnie właśnie zdecydowało się na ten sam krok... Ale tutaj nie da się łączyć z serwerami pocztowymi bez szyfrowania.
W powyższym mailu wsparcie techniczne Yahoo podało linka
generate and use a third-party app password to sign-in securely, który nie działa, więc napisałem do nich ponownie, aby przesłali poprawny link.
Co ciekawe maile z konta Gmail ciągle odbieram przez Outlook 2007, co by oznaczało, że Google jak na razie nie wycofało starszych protokołów.
