I see this message in Xeams.log:

2016-11-03 06:58:13,155 ERROR ImapServerWorker - Received fatal alert: illegal_parameter
javax.net.ssl.SSLException: Received fatal alert: illegal_parameter
at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:190)
at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:136)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.recvAlert(SSLSocketImpl.java:1657)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:932)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1096)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.writeRecord(SSLSocketImpl.java:623)
at com.sun.net.ssl.internal.ssl.AppOutputStream.write(AppOutputStream.java:59)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
at com.synametrics.commons.util.net.imap.server.r.a(ImapServerWorker.java:2196)
at com.synametrics.commons.util.net.imap.server.r.a(ImapServerWorker.java:2176)
at com.synametrics.commons.util.net.imap.server.r.a(ImapServerWorker.java:2172)
at com.synametrics.commons.util.net.imap.server.r.a(ImapServerWorker.java:1879)
at com.synametrics.commons.util.net.imap.server.r.d(ImapServerWorker.java:2139)
at com.synametrics.commons.util.net.imap.server.r$2.run(ImapServerWorker.java:2218)
at java.lang.Thread.run(Thread.java:619)

I cannot find information about ImapServerWorker.

The Xeams server is now unusable.

Thank you.