Does Dreamhost support XEP-0220 server dialback?

Hi Guys, I’ve set up a Jabber server on my domain in order to troubleshoot an intermittent presence/communication issue. I can communicate freely with other Dreamhost XMPP users as well as Gtalk, but I cannot communicate with the domain I need to. SRV records are all good. The domain I need to communicate with requires XEP-0220 server dialback, but has no other restrictions. I can’t seem to find any reference to it in relation to Dreamhost. Anyone know? Thanks in advance.