Actually this appears to just be a doc bug. The notifications/messaging_urls help string indicates this format:
transport://user:pass@host1:port[,hostN:portN]/virtual_host
When in fact, what's needed is the credentials provided for each host in the list, like this:
transport://user:pass@host1:port[,user:pass@hostN:portN]/virtual_host
Actually this appears to just be a doc bug. The notifications/ messaging_ urls help string indicates this format:
transport: //user: pass@host1: port[,hostN: portN]/ virtual_ host
When in fact, what's needed is the credentials provided for each host in the list, like this:
transport: //user: pass@host1: port[,user: pass@hostN: portN]/ virtual_ host