I defined a media type Jabber/XMPP with a user and password.
I notice that actions remain with status "In progress", and I get no messages through.
Running tcpdump show me the zabbix server tries to contact the host which has an A record for the domainpart of the user, instead of checking SRV records.
In this case, the Zabbix jabber user is user on a Google Apps Domain. One clearly sees the connection going to the webserver of this domain instead of going to Google.
Seems like a major bug to me which strangely enough has been around for probaly allways? There are other reports in foraof this, back in 2007 at least.
ZBX-487 might be the same issue?