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Code Issues Releases Wiki Activity

Updated FAQ

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M66B 2023-11-10 09:11:33 +01:00
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commit 05b950a95b
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FAQ.md
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@ -2092,8 +2092,8 @@ The error '*Handshake failed SSL handshake terminated ... SSLV3_ALERT_HANDSHAKE_
can be caused by [this Android 7.0 bug](https://issuetracker.google.com/issues/37122132). This can unfortunately not be fixed by FairEmail. can be caused by [this Android 7.0 bug](https://issuetracker.google.com/issues/37122132). This can unfortunately not be fixed by FairEmail.
The error '*Handshake failed ... UNSUPPORTED_PROTOCOL or TLSV1_ALERT_PROTOCOL_VERSION or SSLV3_ALERT_HANDSHAKE_FAILURE ...*' The error '*Handshake failed ... UNSUPPORTED_PROTOCOL or TLSV1_ALERT_PROTOCOL_VERSION or SSLV3_ALERT_HANDSHAKE_FAILURE ...*'
might be caused by enabling **hardening connections**, or requiring TLS 1.3 in the connection settings might be caused by enabling **hardening connections** or **Bouncy Castle** in the connection settings tab page,
or by Android not supporting older protocols anymore, like SSLv3. or by Android not supporting older protocols anymore, like SSLv3 and TLSv1.
Android 8 Oreo and later [do not support](https://developer.android.com/about/versions/oreo/android-8.0-changes#security-all) SSLv3 anymore. Android 8 Oreo and later [do not support](https://developer.android.com/about/versions/oreo/android-8.0-changes#security-all) SSLv3 anymore.
There is no way to workaround lacking RC4 and SSLv3 support because it has completely been removed from Android (which should say something). There is no way to workaround lacking RC4 and SSLv3 support because it has completely been removed from Android (which should say something).

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index.html
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@ -1172,7 +1172,7 @@ X-Google-Original-From: Somebody &lt;somebody+extra@example.org&gt;</code></pre>
<p>The error ‘<em>Handshake failed … SSLV3_ALERT_ILLEGAL_PARAMETER …</em>’ is either caused by a bug in the SSL protocol implementation or by a too short DH key on the email server and can unfortunately not be fixed by FairEmail.</p> <p>The error ‘<em>Handshake failed … SSLV3_ALERT_ILLEGAL_PARAMETER …</em>’ is either caused by a bug in the SSL protocol implementation or by a too short DH key on the email server and can unfortunately not be fixed by FairEmail.</p>
<p>The error ‘<em>Handshake failed … HANDSHAKE_FAILURE_ON_CLIENT_HELLO …</em>’ might be caused by the provider still using RC4, which isn’t supported since <a href="https://developer.android.com/about/versions/nougat/android-7.0-changes.html#tls-ssl">Android 7</a> anymore.</p> <p>The error ‘<em>Handshake failed … HANDSHAKE_FAILURE_ON_CLIENT_HELLO …</em>’ might be caused by the provider still using RC4, which isn’t supported since <a href="https://developer.android.com/about/versions/nougat/android-7.0-changes.html#tls-ssl">Android 7</a> anymore.</p>
<p>The error ‘<em>Handshake failed SSL handshake terminated … SSLV3_ALERT_HANDSHAKE_FAILURE … HANDSHAKE_FAILURE_ON_CLIENT_HELLO</em>’ can be caused by <a href="https://issuetracker.google.com/issues/37122132">this Android 7.0 bug</a>. This can unfortunately not be fixed by FairEmail.</p> <p>The error ‘<em>Handshake failed SSL handshake terminated … SSLV3_ALERT_HANDSHAKE_FAILURE … HANDSHAKE_FAILURE_ON_CLIENT_HELLO</em>’ can be caused by <a href="https://issuetracker.google.com/issues/37122132">this Android 7.0 bug</a>. This can unfortunately not be fixed by FairEmail.</p>
<p>The error ‘<em>Handshake failed … UNSUPPORTED_PROTOCOL or TLSV1_ALERT_PROTOCOL_VERSION or SSLV3_ALERT_HANDSHAKE_FAILURE …</em>’ might be caused by enabling <strong>hardening connections</strong>, or requiring TLS 1.3 in the connection settings or by Android not supporting older protocols anymore, like SSLv3.</p> <p>The error ‘<em>Handshake failed … UNSUPPORTED_PROTOCOL or TLSV1_ALERT_PROTOCOL_VERSION or SSLV3_ALERT_HANDSHAKE_FAILURE …</em>’ might be caused by enabling <strong>hardening connections</strong> or <strong>Bouncy Castle</strong> in the connection settings tab page, or by Android not supporting older protocols anymore, like SSLv3 and TLSv1.</p>
<p>Android 8 Oreo and later <a href="https://developer.android.com/about/versions/oreo/android-8.0-changes#security-all">do not support</a> SSLv3 anymore. There is no way to workaround lacking RC4 and SSLv3 support because it has completely been removed from Android (which should say something).</p> <p>Android 8 Oreo and later <a href="https://developer.android.com/about/versions/oreo/android-8.0-changes#security-all">do not support</a> SSLv3 anymore. There is no way to workaround lacking RC4 and SSLv3 support because it has completely been removed from Android (which should say something).</p>
<p>Please <a href="https://developer.android.com/reference/javax/net/ssl/SSLSocket">see here</a> for an overview of supported protocols and cipher suites by Android version.</p> <p>Please <a href="https://developer.android.com/reference/javax/net/ssl/SSLSocket">see here</a> for an overview of supported protocols and cipher suites by Android version.</p>
<p>You can use <a href="https://ssl-tools.net/mailservers">this website</a> or <a href="https://www.immuniweb.com/ssl/">this website</a> to check for SSL/TLS problems of email servers.</p> <p>You can use <a href="https://ssl-tools.net/mailservers">this website</a> or <a href="https://www.immuniweb.com/ssl/">this website</a> to check for SSL/TLS problems of email servers.</p>