I'm currently investigating getting a (private) SIP account and have looked around various providers.
As far as I can see they all give you addresses like
firstname.lastname@example.org but if I would distribute that to friends and would want to switch providers later I would have to tell everyone that I can now be reached at
This reminds me of the 90s where everyone had email addresses issued by their ISP and I don't want to repeat that. Basically I want a SIP address that I can transfer from one provider to another. I have an Ubuntu VPS and I'm wondering if I can some sort of redirect from my VPS to the actual SIP provider?