Adde FAQ

FAQ.md

@@ -123,6 +123,7 @@ Note that your contacts could unknowingly send malicious messages if they got in
 * [(59) Can original messages be opened in the browser?](#user-content-faq59)
 * [(60) Did you known ...?](#user-content-faq60)
 * [(61) Why are some messages shown dimmed?](#user-content-faq61)
+* [(62) Can CRAM-MD5 authentication be supported?](#user-content-faq62)
 
 [I have another question.](#support)
 
@@ -962,6 +963,13 @@ You can view these messages, but you cannot move these messages again until the
 
 <br />
 
+<a name="faq62"></a>
+**(62) Can CRAM-MD5 authentication be supported?**
+
+Unfortunately, [JavaMail for Android](https://javaee.github.io/javamail/Android) does not support SASL authentication, so CRAM-MD5 authentication cannot be supported.
+
+<br />
+
 ## Support
 
 If you have another question, want to request a feature or report a bug, you can use [this forum](https://forum.xda-developers.com/android/apps-games/source-email-t3824168).