> My problem is following-
> Application receives an INVITE message from source IP address A with
FQDN
> in Via header. FQDN is resolved through DNS A query and receives DNS
reply
> where IP address B is mentioned at top and IP address A is mentioned
after
> that. So, all the responses are sent to IP address B. Calling side keeps
> retransmitting the request from source address A and call does not go
> through. Is there anything which can be changed in application's
behaviour?

The server should follow RFC 3261 section 18.2.2.

Based upon what you provided (assuming no maddr or connection issues), the
UAS should add and use the received address.  It sounds like the UAS
didn't add the received parameter for use with the evaluation.
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