If enabled, MDaemon will respond to 'DATA' with a 5xx error-code unless the session has been previously authenticated.
![mdaemon mail server authentication mdaemon mail server authentication](https://static.mdaemon.com/Images/Screenshots/MDaemon-Webmail/MDaemon-Webmail_Setting-Two-Factor-Authentication.jpg)
This option forces AUTH for all SMTP sessions, which is useful in certain specialized configurations in which you are sure that all incoming connections can authenticate.
![mdaemon mail server authentication mdaemon mail server authentication](https://static.mdaemon.com/Images/Screenshots/MDaemon-Mail-Server/EN_MDaemon-Mail-Server_Account-Manager-View-Options.jpg)
Note: this may be necessary in some situations where you require some of your users to use different mail servers for outgoing and incoming mail.Īuthentication is required for all SMTP sessions If you are requiring authentication when a message is from a local sender, but wish to skip the authentication restriction when the recipient is local as well, then click this option. When this option is enabled and an incoming message claims to be from one of MDaemon ' s domains, the account must first be authenticated or MDaemon will refuse to accept the message for delivery. An authenticated user will not need to check his or her email before sending messages.Īuthentication is always required when mail is from local accounts If you are utilizing the POP Before SMTP security feature, you can click this option to make authenticated users exempt from this restriction. This option is enabled by default.ĭon't apply POP Before SMTP to authenticated sessions Further, when a user doesn't authenticate and access is refused, the message returned to the SMTP client will be "Authentication required" in order to give the user a clue that he can fix the problem by configuring the mail client to use authentication before sending a message. Mail will be accepted from an authenticated user regardless of the IP address from which he or she connects. When this control is active, the IP Shield restrictions will not apply to authenticated users. Don't apply IP Shield to authenticated sessions