slashdot should have a bot to do this: for the millionth time, there is NO free (as in beer) FOSS jabber server that supports all the necessary XEPs for reliable message delivery on mobile devices (devices with frequent network dropouts, IP changes, packet loss). PAID version of ejabberd is the closest you can get to reliable xmpp message delivery.
and 2nd of all, there are almost no xmpp clients that support the said XEPs. last time i checked, there were only 2 somewhat equipped for it. one is discontinued, the other one is Conversations. again, Conversations isn't free (as in beer). it used to be on fdroid too but i can't find it there anymore.
for those interested, to have reliable xmpp communication on a mobile device, you need at the very least - xep-198, xep-280, xep-313
xmpp is overly complicated, stupid (xml), doesn't reflect current user requirements (mobile devices) and speed of its evolution is hampered by the massive number of stakeholders.