What kind of authentication do I need for Azure relay?
Applications can authenticate to Azure Relay using Shared Access Signature (SAS) authentication. SAS authentication enables applications to authenticate to the Azure Relay service using an access key configured on the Relay namespace.
Do you need authenticated SMTP to relay email?
He needs to use authenticated SMTP. This is similar to the previous case but John’s email program will also send his username and password. Of course we are making sure that his authentication happens over an encrypted connection. In addition to using SMTP authentication you can tell Postfix to always relay email for certain IP addresses.
How many authorization rules do I need for relay?
Up to 12 such authorization rules can be configured on a Relay namespace. By default, a SharedAccessAuthorizationRule with all rights is configured for every namespace when it is first provisioned.
How are SAS tokens generated in azure relay?
To access an entity, the client requires a SAS token generated using a specific SharedAccessAuthorizationRule. The SAS token is generated using the HMAC-SHA256 of a resource string that consists of the resource URI to which access is claimed, and an expiry with a cryptographic key associated with the authorization rule.
What does it mean to be unable to relay for email address?
This error means that the sender is not allowed to relay through the server. Most mail servers have security measures to prevent them from being open relays. An open relay is an insecure mail server that allows anybody to connect to it and send mails without proper authentication.
What are the rights of a relay connection?
Rights representing the collection of Listen, Send, or Manage rights granted. Authorization rules configured at the namespace level can grant access to all relay connections in a namespace for clients with tokens signed using the corresponding key. Up to 12 such authorization rules can be configured on a Relay namespace.