Message from own nick are not echoed in XMPP MUCs
Submitted by Florian Zeitz
Messages send to a MUC are directly copied from the text-entry. If a message is received from the server that with our nick it is not echoed. This has the following consequences:
XEP-0045 allows using one nickname from multiple resources. Messages from another resource using the same nickname are not visible/lost.
Servers can change the text you send before sending it back. This is sometimes used for bot-like tasks or just nonsense. E.g. xmpp:email@example.com?join