Updated FAQ

FAQ.md

@@ -1419,6 +1419,10 @@ Mobile connections are almost always metered and some (paid) Wi-Fi hotspots are
 
 🌎 [Google Translate](https://translate.google.com/translate?sl=en&u=https%3A%2F%2Fm66b.github.io%2FFairEmail%2F%23faq16)
 
+Synchronization problems are seldom the fault of the app, but are almost always caused by internet connectivity or email server problems.
+The first thing to check is whether battery optimzations are **disabled** via setup step 3 in the main settings screen.
+If you can't solve the problem, [please contact me](#get-support), and I'll explain how to send the debug info for a proper anaylysis.
+
 Possible causes of messages not being synchronized (sent or received) are:
 
 * The account or folder(s) are not set to synchronize

index.html

@@ -919,6 +919,7 @@ Visit https://aka.ms/smtp_auth_disabled for more information.</code></pre>
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 <p><a name="faq16"></a> <strong>(16) Why are messages not being synchronized?</strong></p>
 <p>🌎 <a href="https://translate.google.com/translate?sl=en&amp;u=https%3A%2F%2Fm66b.github.io%2FFairEmail%2F%23faq16">Google Translate</a></p>
+<p>Synchronization problems are seldom the fault of the app, but are almost always caused by internet connectivity or email server problems. The first thing to check is whether battery optimzations are <strong>disabled</strong> via setup step 3 in the main settings screen. If you can’t solve the problem, <a href="#get-support">please contact me</a>, and I’ll explain how to send the debug info for a proper anaylysis.</p>
 <p>Possible causes of messages not being synchronized (sent or received) are:</p>
 <ul>
 <li>The account or folder(s) are not set to synchronize</li>