K8s nginx ingress path return 404 - nginx

Question

I am trying to setup my services inside nginx ingress. In this case, I want to have a mail service along the path test.io/mail/. I make a request to test.io/mail/send_mail/ the response comes 404.
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: test-ingress
namespace: test-backend
spec:
ingressClassName: nginx
rules:
- host: test.io
http:
paths:
- path: /mail/
pathType: Exact
backend:
service:
name: email-test
port:
number: 80
If I change the settings and remove the prefix, then everything will work.
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: test-ingress
namespace: test-backend
spec:
ingressClassName: nginx
rules:
- host: test.io
http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: email-test
port:
number: 80
How do I properly set the prefix?

Answer 1

Please have ingress yaml as below to use "pathType: Prefix" instead of "pathType: Exact"
rules:
- host: test.io
http:
paths:
- path: /mail/
pathType: Prefix
Please refer official documentation for more details for
pathType: Prefix

Answer 2

Each path in an Ingress is required to have a corresponding path type. Paths that do not include an explicit pathType will fail validation.
The only supported wildcard character for the path field of an Ingress is the * character. The * character must follow a forward slash (/) and must be the last character in the pattern. For example, /, /foo/, and /foo/bar/* are valid patterns, but , /foo/bar, and /foo//bar are not.A more specific pattern takes precedence over a less specific pattern. If you have both /foo/ and /foo/bar/, then /foo/bar/bat is taken to match /foo/bar/.For more information about path limitations and pattern matching, see the URL Maps documentation.
Suggestion :
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: test-ingress
namespace: test-backend
spec:
ingressClassName: nginx
rules:
- host: test.io
http:
paths:
- path: /mail/*
pathType: Exact
backend:
service:
name: email-test
port:
number: 80
- path: /
pathType: Prefix
backend:
service:
name: email-test
port:
number: 80
Additional reference doc :
Refer1
Refer2