[Asterisk-Users] plainvoip - IAX2 call rejected

[Joseph]

Is anybody using "plainvoip" provider with IAX2?  They seem to support
IAX but it rejects my calls.
   -- Executing Dial("SIP/11-cb98", "IAX2/17894781770 at plainvoip") in new
stack
    -- Called 17894781770 at plainvoip
May 14 00:33:32 WARNING[26580]: chan_iax2.c:5553 socket_read: Call
rejected by 66.199.240.2: No authority found

My registration goes through OK.
My dial plan:
....
exten => _1NXXNXXXXXX,2,Dial,IAX2/${EXTEN}@plainvoip
....

-- 
#Joseph