I have test Email Routing ,before this,I used 163 mail ,it works well.
when I move to Email Routing ，I got this error:
Remote Server returned ‘550 5.1.1 Domain does not exist’
After remove all old email dns(https://ym.163.com/help/help.html#3.6), Let Email Routing automatically create the required dns records . It works well.
This topic is report bug.
If only change content ( from v=spf1 include:spf.163.com ~all to v=spf1 include:_spf.mx.cloudflare.net ~all)
I will get error:
Remote Server returned ‘550 5.1.1 Domain does not exist’