Accessing mailpit-smtp service via ingress

[Bobses]

Hello,

Is there any possibility to access the mailpit-smtp service from Kubernetes through an ingress? In other words, can messages be sent to mailpit installed in kubernetes from an external application (an app created outside Kubernetes, where mailpit-smtp.namespace.svc.cluster.local cannot be used)?

I tried to create a working ingress for the mailpit-smtp service but without success.

I didn't find any discussion about this.

Thank you!

[jouve]

Hi,

Most ingress only supports http(s).

For TCP protocols like SMTP, you can set the service type to LoadBalancer (your cluster need to support this)

[Bobses]

Thank you for your answer.

The solution I found for traefik ingress controller (it creates an NLB in AWS):

• reinstall mailpit to work on port 1025 (port 25 is blocked by Amazon)
• configure a new entryPoint for Traefik (expose port 1025 for traefik service)
• create a new resource IngressRouteTCP - routes/match: HostSNI(*) for mailpit-smtp service on port 1025
• test the connectivity to the mailpit-smtp service: telnet NLB-IP-Address 1025

It seems to work. I'm looking for a solution when the ingress-nginx controller is used.