[Sip-implementors] subscription removal on error response to NOTIFY

Hi, I have a few question regarding interpretation of RFC 3265. Paragraph 3.2.2 states that: If the NOTIFY request fails (as defined above) due to a timeout condition, and the subscription was installed using a soft-state mechanism (such as SUBSCRIBE), the notifier SHOULD remove the

Re: [Sip-implementors] subscription removal on error response to NOTIFY

So for non-recoverable errors, it really does mean the subscription is gone. (Recoverable errors are things like digest challenges or complaints about body of the NOTIFY). Non-recoverable errors could be transport errors (ICMP) or SIP responses (like a 480 from a proxy that can't get things