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#### Description <!-- Describe your changes in detail -->

https://datatracker.ietf.org/doc/html/rfc3265#section-3.2.2 says that if a NOTIFY fails, the subscription should be removed. There is one exception only, when a Retry-After is specified.

This is done in order to cleanup state and not keep it around for huge periods of time. This is preferred and the client is the one that should re-subscribe at intervals to fix the situation.

Anyway, I guess I was super annoyed by the huge number of useless notifications that I'm getting for gone IMS clients. You can view, comment on, or merge this pull request online at:

https://github.com/kamailio/kamailio/pull/3895

-- Commit Summary --

* ims_registrar_scscf: drop subscription on notification failure

-- File Changes --

M src/modules/ims_registrar_scscf/registrar_notify.c (153)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/3895.patch https://github.com/kamailio/kamailio/pull/3895.diff