When incoming connection is established (e.g. your Outlook is sending the message you’ve just written) quickSMTP will register this connection in its connection history screen and also add informational line in the server log console and file. First thing to check is, if the IP Address of the sender is listed as allowed for mail relay in your server configuration. If this is the case, then quickSMTP will grant the right to send any messages to the client that has connected.
In case relay is not allowed, the following two scenarios are possible:
- The client might issue authentication command and if authentication is successful (both username and password match an existing mailbox that you have defined), the client will be granted the right to send any messages thru your quickSMTP.
- The client might attempt to send a message. quickSMTP will accept this message, and if the message is addressed to an e-mail address, which is defined by you in your list of mailboxes, the message will be accepted and delivered to that mailbox. But if the address is not on your list, then the message will be declined and the client will be informed, that s/he is not authorized to use this system.