Log IMAP capabilities

app/src/main/java/com/sun/mail/imap/IMAPStore.java

@@ -1571,6 +1571,19 @@ public class IMAPStore extends Store
         }
     }
 
+	public synchronized Map<String, String> getCapabilities()
+			throws MessagingException {
+		IMAPProtocol p = null;
+		try {
+			p = getStoreProtocol();
+			return p.getCapabilities();
+		} catch (ProtocolException pex) {
+			throw new MessagingException(pex.getMessage(), pex);
+		} finally {
+			releaseStoreProtocol(p);
+		}
+	}
+
     /**
      * Set the user name to be used with the PROXYAUTH command.
      * The PROXYAUTH user name can also be set using the

app/src/main/java/eu/faircode/email/ServiceSynchronize.java

@@ -77,6 +77,7 @@ import javax.mail.MessagingException;
 import javax.mail.NoSuchProviderException;
 import javax.mail.Quota;
 import javax.mail.ReadOnlyFolderException;
+import javax.mail.Store;
 import javax.mail.StoreClosedException;
 import javax.mail.event.FolderAdapter;
 import javax.mail.event.FolderEvent;
@@ -1037,7 +1038,14 @@ public class ServiceSynchronize extends ServiceBase implements SharedPreferences
                     db.account().setAccountState(account.id, "connected");
                     db.account().setAccountError(account.id, null);
                     db.account().setAccountWarning(account.id, null);
-                    EntityLog.log(this, account.name + " connected");
+
+                    Store istore = iservice.getStore();
+                    if (istore instanceof IMAPStore) {
+                        Map<String, String> caps = ((IMAPStore) istore).getCapabilities();
+                        EntityLog.log(this, account.name + " connected" +
+                                " caps=" + (caps == null ? null : TextUtils.join(" ", caps.keySet())));
+                    } else
+                        EntityLog.log(this, account.name + " connected");
 
                     db.account().setAccountMaxSize(account.id, iservice.getMaxSize());
 

patches/JavaMail.patch

@@ -379,3 +379,27 @@ diff -rupN /home/marcel/JavaMail/mail/src/main/java/com/sun/mail/imap/protocol/I
  	}
      }
  }
+diff --git a/app/src/main/java/com/sun/mail/imap/IMAPStore.java b/app/src/main/java/com/sun/mail/imap/IMAPStore.java
+index 087e5a6f5..5fa720f3d 100644
+--- a/app/src/main/java/com/sun/mail/imap/IMAPStore.java
++++ b/app/src/main/java/com/sun/mail/imap/IMAPStore.java
+@@ -1571,6 +1571,19 @@ public class IMAPStore extends Store
+         }
+     }
+ 
++	public synchronized Map<String, String> getCapabilities()
++			throws MessagingException {
++		IMAPProtocol p = null;
++		try {
++			p = getStoreProtocol();
++			return p.getCapabilities();
++		} catch (ProtocolException pex) {
++			throw new MessagingException(pex.getMessage(), pex);
++		} finally {
++			releaseStoreProtocol(p);
++		}
++	}
++
+     /**
+      * Set the user name to be used with the PROXYAUTH command.
+      * The PROXYAUTH user name can also be set using the